Vulnerability database
Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.
1,912 results · page 1 of 39
Oct 28, 2026python-markdown2 through 2.5.5 contains a denial of service vulnerability that allows remote users to exhaust CPU by submitting Markdown with unclosed inline liCVE-2026-118694 · Other software · trentm · reported by VulnCheckHigh 8.7
python-markdown2 through 2.5.5 contains a denial of service vulnerability that allows remote users to exhaust CPU by submitting Markdown with unclosed inline link destinations. Attackers can submit repeated '[a](' or ' in FileArtifactService in Google Agent Development Kit (ADK) for Python (google-adk) versions 1.19.0 before 1.39.CVE-2026-115522 · Computers, phones & browsers · Google · reported by cve-coordination@google.comMedium 5.3
Exposure of Resource to Wrong Sphere (CWE-668) in FileArtifactService in Google Agent Development Kit (ADK) for Python (google-adk) versions 1.19.0 before 1.39.1 and 2.0.0a1 before 2.7.0 allows a caller in one application to list, read, overwrite, or delete artifacts belonging to another application when both applications share a FileArtifactService root directory and use the same user_id (and session_id for session-scoped artifacts). FileArtifactService accepted app_name across its public API methods but omitted app_name when constructing on-disk paths (root/users/{user_id}/... instead of root/apps/{app_name}/users/{user_id}/...). Version 2.6.0 scoped writes by app_name but retained a legacy root/users/{user_id} fallback for reads and deletes; version 2.7.0 and the 1.x backport in version 1.39.1 removed the fallback and enforce full per-app path scoping.
- Product
- Agent Development Kit (ADK) for Python
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026OpenTelemetry Python provides the Python API and SDK for OpenTelemetry.CVE-2026-116694 · Other software · open-telemetry · reported by GitHubMedium 6.3
OpenTelemetry Python provides the Python API and SDK for OpenTelemetry. Prior to 1.45.0, JaegerPropagator.extract() in opentelemetry-propagator-jaeger processes inbound uberctx-* baggage values without entry, per-entry byte, or total-byte limits. Services that enable the optional Jaeger propagator can perform unnecessary CPU work and short-lived heap allocations when an untrusted carrier supplies numerous or oversized values, contributing to denial of service when transport-level limits do not constrain the input. Common default Python HTTP server limits reduce the practical impact, while custom getters, non-HTTP transports, or raised header limits increase exposure. This issue is fixed in version 1.45.0.
- Product
- opentelemetry-python
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients.CVE-2026-116686 · Other software · modelcontextprotocol · reported by GitHubMedium 6.5
The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.10.0 until 1.30.0 and 2.2.0, ClientSession, ClientSessionGroup, and Client tool calls validate server-declared outputSchema documents with jsonschema's default resolver, causing an unresolved $ref value to fetch an HTTP, HTTPS, or file URL from the client's network and filesystem context. A server can trigger blind requests or local-file reads and can stall every session in the process because resolution runs synchronously on the event loop without a timeout. This issue is fixed in versions 1.30.0 and 2.2.0.
- Product
- python-sdk
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients.CVE-2026-116685 · Other software · modelcontextprotocol · reported by GitHubMedium 5.9
The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.8.0 until 1.30.0 and 2.2.0, streamable_http_client, streamablehttp_client, sse_client, ClientSessionGroup, OAuth, and create_mcp_http_client client paths enable follow_redirects and follow redirects to a different origin, forwarding caller-supplied custom credential headers and, for 307 or 308 responses, the request body. An attacker who can influence a trusted endpoint's redirect destination can receive that material. This issue is fixed in versions 1.30.0 and 2.2.0.
- Product
- python-sdk
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients.CVE-2026-116684 · Other software · modelcontextprotocol · reported by GitHubMedium 6.8
The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.10.0 until 1.30.0 and 2.2.0, server-side bearer authentication configured through AuthSettings with token_verifier accepts a valid token issued for another service when the authorization server serves multiple resources and the TokenVerifier does not independently validate the aud audience. This resource-confusion flaw lets a token holder authenticate to the wrong MCP server and exercise that token's resulting access. This issue is fixed in versions 1.30.0 and 2.2.0.
- Product
- python-sdk
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026Response body and chunk parsing would handle non-hex or negative integers incorrectly which could result in misinterpreting HTTP response contents.CVE-2026-103995 · Other software · Python Software Foundation · reported by cna@python.orgLow 2
Response body and chunk parsing would handle non-hex or negative integers incorrectly which could result in misinterpreting HTTP response contents.
- Product
- CPython
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 27, 2026Authlib is a Python library which builds OAuth and OpenID Connect servers.CVE-2026-116672 · Other software · authlib · reported by GitHubHigh 8.8
Authlib is a Python library which builds OAuth and OpenID Connect servers. From 0.15 until 1.9.1, the documented ClientConfigurationEndpoint.authenticate_client and ClientConfigurationEndpoint.check_permission reference implementations look up a target client from request-controlled client_id data and check only whether that target is editable, without verifying that request.credential belongs to the target client. Deployments following both examples can allow a client holding any valid registration access token to read, modify, or delete another client's registration. Changing redirect_uris can enable authorization code or token interception, while deleting registrations can deny service to affected clients. This issue is fixed in version 1.9.1.
- Product
- authlib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 26, 2026Datadog dd-trace-py is the Datadog Python APM client.CVE-2026-116589 · Other software · DataDog · reported by GitHubHigh 8.2
Datadog dd-trace-py is the Datadog Python APM client. From 3.13.0 until 4.15.5, the IAST string-processing instrumentation does not properly handle certain internal errors while old-style % string formatting processes attacker-controlled input. An unhandled error can terminate the Python process and interrupt the work it is handling. Exploitation requires IAST to be enabled, which is not the default, and application code to apply the affected formatting operation to attacker-controlled input. This issue is fixed in version 4.15.5.
- Product
- dd-trace-py
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 26, 2026Datadog dd-trace-py is the Datadog Python APM client.CVE-2026-116588 · Other software · DataDog · reported by GitHubHigh 8.7
Datadog dd-trace-py is the Datadog Python APM client. From 1.5.0 until 3.19.9 and 4.15.6, the default query-string obfuscation regular expression can exhibit excessive backtracking while synchronously processing attacker-controlled URL query strings for HTTP span metadata. A remote attacker can cause prolonged CPU consumption, request latency, and service unavailability in affected HTTP tracing integrations that include query strings in URL span tags. The vulnerable processing is enabled by default for those integrations. This issue is fixed in versions 3.19.9 and 4.15.6.
- Product
- dd-trace-py
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 26, 2026Autobahn Python is a WebSocket and WAMP implementation for Python that supports Twisted and asyncio.CVE-2026-116579 · Other software · crossbario · reported by GitHubMedium 5.9
Autobahn Python is a WebSocket and WAMP implementation for Python that supports Twisted and asyncio. From 26.7.1 until 26.10.1, PerMessageBrotli.decompress_message_data in compress_brotli.py calls the Brotli decompressor without an output limit and checks maxMessagePayloadSize only after a complete frame has been inflated. An unauthenticated WebSocket client can send a small, highly compressed frame that allocates hundreds of MiB before rejection, causing memory-exhaustion denial of service on servers that enable the opt-in permessage-brotli feature through the compress extra. Deflate and bzip2 already enforce the remaining output budget and are outside this residual vulnerability. This issue is fixed in version 26.10.1.
- Product
- autobahn-python
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 26, 2026Tornado is a Python web framework and asynchronous networking library.CVE-2026-116578 · Other software · tornadoweb · reported by GitHubLow 2.1
Tornado is a Python web framework and asynchronous networking library. Prior to 6.6, tornado.web.RedirectHandler URL templates can place regex-capture substitutions where crafted request paths change the redirect scheme or network location. Affected placements include substitutions at the start of a path, directly after a fixed host, or at the beginning of the template, including protocol-relative, absolute, backslash, encoded, host-extension, and user-info variants interpreted by browsers as attacker-controlled destinations. Static templates and substitutions after a fixed host followed by a slash are not affected. An attacker can use the resulting open redirect on the application's domain for phishing. This issue is fixed in version 6.6.
- Product
- tornado
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 26, 2026Tornado is a Python web framework and asynchronous networking library.CVE-2026-116577 · Other software · tornadoweb · reported by GitHubMedium 5.3
Tornado is a Python web framework and asynchronous networking library. Prior to 6.6, Tornado's HTTP header parser accepts obsolete line folding and repeatedly concatenates short continuation lines, causing quadratic CPU consumption on the IOLoop thread. An unauthenticated client can submit a header block containing many obsolete line-folding continuations before application code runs, blocking other connections served by the process. The cost grows with max_header_size, and only availability is affected. This issue is fixed in version 6.6.
- Product
- tornado
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 26, 2026Tornado is a Python web framework and asynchronous networking library.CVE-2026-115927 · Other software · tornadoweb · reported by GitHubMedium 5.3
Tornado is a Python web framework and asynchronous networking library. Prior to 6.6.0, Tornado decodes HTTP/1.1 chunked transfer encoding by processing body data that has already arrived without yielding to the event loop. A remote unauthenticated peer can send millions of one-byte chunks to monopolize the process event loop and stall every other connection served by that process, while lowering max_body_size only limits the duration of each request. For handlers that do not use @stream_request_body, retaining each chunk as a separate object can consume roughly twenty times the received body size, and SimpleAsyncHTTPClient has the same event-loop behavior when reading a response from a malicious server. This issue is fixed in version 6.6.0.
- Product
- tornado
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 26, 2026Python Social Auth is a social authentication and registration mechanism.CVE-2026-115910 · Other software · python-social-auth · reported by GitHubMedium 6.8
Python Social Auth is a social authentication and registration mechanism. Prior to 6.2.0, OpenIdConnectAuth in social_core/backends/open_id_connect.py uses get_and_store_nonce to place the OpenID Connect nonce in a shared OpenIdConnectAssociation table, and get_nonce and validate_claims verify only that the nonce exists and has not expired rather than binding it to the browser session and OAuth state that initiated the login. An attacker who obtains a victim's unused authorization code can start a separate login to obtain valid state for the attacker's browser, submit the victim's code with that state, and pass nonce validation because the victim nonce is globally available. With DEFAULT_USE_PKCE disabled in the default OpenIdConnectAuth configuration, the attacker can be logged in as the victim. This issue is fixed in version 6.2.0.
- Product
- social-core
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 24, 2026Python has added a denylist for known compromised certificates to the "ssl" module to ensure user safety even without certificate revocation configured.CVE-2026-115557 · Other software · Python Software Foundation · reported by cna@python.orgCritical 9.4
Python has added a denylist for known compromised certificates to the "ssl" module to ensure user safety even without certificate revocation configured. Known compromised certificates will automatically be rejected regardless of the SSLContext policy configuration.
- Product
- CPython
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordopenwall.comemudhra.we-have-a-problem.com
Oct 23, 2026Twisted is an event-based framework for internet applications, supporting Python 3.6+.CVE-2026-83813 · Other software · twisted · reported by GitHubLow 3.1
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.names.dns.DNSDatagramProtocol accepts a UDP DNS response for a pending query when its 16-bit transaction ID matches but does not verify that the response came from the queried host and port. An attacker able to deliver a packet to the resolver's listening port with the correct transaction ID can inject a forged answer. The standard twisted.names.client.Resolver uses a new random source port for each query, increasing off-path attack complexity, while applications that reuse a DNSDatagramProtocol instance expose only the transaction-ID search space after the first query. A successful forgery can redirect hostname resolution and enable mail interception, server-side request forgery, or man-in-the-middle positioning. This issue is fixed in version 26.10.0rc1.
- Product
- twisted
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 23, 2026Twisted is an event-based framework for internet applications, supporting Python 3.6+.CVE-2026-115877 · Other software · twisted · reported by GitHubMedium 5.4
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.web.http.HTTPChannel.headerReceived rejects a NUL byte in an HTTP header value but accepts a bare carriage return or bare line feed. Because Twisted splits header lines only on CRLF, a hidden Content-Length header can remain folded into another value while a lenient front end treats the bare character as a line terminator. The resulting framing disagreement can smuggle a following request past front-end access controls, poison a shared connection or cache, and expose a later client to the wrong response. This issue is an incomplete-fix residual of earlier Twisted request-smuggling protections. This issue is fixed in version 26.10.0rc1.
- Product
- twisted
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 23, 2026Twisted is an event-based framework for internet applications, supporting Python 3.6+.CVE-2026-115778 · Other software · twisted · reported by GitHubHigh 7.5
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.conch.telnet.Telnet.dataReceived appends every byte received after IAC SB to a persistent subnegotiation buffer until IAC SE is received, without applying a maximum length. Telnet option negotiation occurs before authentication, so an unauthenticated peer can omit the terminator and continuously grow the buffer. The resulting memory exhaustion can terminate the process and every service it hosts. This issue is fixed in version 26.10.0rc1.
- Product
- twisted
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 23, 2026Twisted is an event-based framework for internet applications, supporting Python 3.6+.CVE-2026-115776 · Other software · twisted · reported by GitHubHigh 7.5
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.words.protocols.irc.IRC.dataReceived retains all bytes received without a line feed in its per-connection buffer and applies no maximum line length. The twisted.words.service.IRCUser server subclass inherits this behavior, and buffering occurs before PASS, NICK, or USER authentication commands. An unauthenticated connection can continuously grow the buffer until the shared server process runs out of memory and drops all users. This issue is fixed in version 26.10.0rc1.
- Product
- twisted
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 23, 2026Twisted is an event-based framework for internet applications, supporting Python 3.6+.CVE-2026-115775 · Other software · twisted · reported by GitHubHigh 8.7
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, the twisted.words.xish.domish ExpatElementStream parser allows an unauthenticated remote peer to keep a container element open while continuously adding child elements. The parser retains the unfinished stanza as an in-memory tree without a byte or element-count limit, and XMPP pre-authentication stream parsing exposes this behavior before credentials are accepted. A single connection can therefore exhaust server memory and terminate the process. This issue is fixed in version 26.10.0rc1.
- Product
- twisted
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 23, 2026Twisted is an event-based framework for internet applications, supporting Python 3.6+.CVE-2026-115774 · Other software · twisted · reported by GitHubMedium 4.9
Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.mail.imap4.IMAP4Server reaches twisted.mail.imap4.parseNestedParens with a negative literal size in an authenticated SEARCH command after the client enters the selected mailbox state. The negative size moves the parser cursor below zero, and Python's negative indexing prevents the synchronous scanning loop from terminating. The loop freezes the single-threaded reactor, stopping other IMAP connections and any SMTP or POP3 services hosted in the same process until restart. This issue is fixed in version 26.10.0rc1.
- Product
- twisted
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 23, 2026virtualenv is a tool for creating isolated virtual python environments.CVE-2026-115586 · Other software · pypa · reported by GitHubHigh 7.1
virtualenv is a tool for creating isolated virtual python environments. From 21.14.9 until 21.14.13, the bash bin/activate script can copy an attacker-controlled --prompt value into PS1 without escaping dollar signs or backticks when both promptvars and POSIX mode are disabled during activation. Re-enabling promptvars, running set -o posix, or starting an interactive child bash that inherits the exported PS1 can then expand command substitution in the stored VIRTUAL_ENV_PROMPT value and execute commands as the user who activates the environment. This issue is fixed in version 21.14.13.
- Product
- virtualenv
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 23, 2026pypdf is a free and open-source pure-python PDF library.CVE-2026-115585 · Other software · py-pdf · reported by GitHubHigh 7.1
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an incomplete remediation for repeated malformed cross-reference entries in GHSA-55h5-xmcq-c37v could still trigger a complete PDF stream reload during each recovery attempt even when a recovery cache was present, causing crafted cross-reference streams to produce long runtimes. This issue is fixed in version 6.21.2.
- Product
- pypdf
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 23, 2026pypdf is a free and open-source pure-python PDF library.CVE-2026-115580 · Other software · py-pdf · reported by GitHubHigh 7.1
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF with a standard cross-reference table whose declared entry count exceeds what the file can contain, causing excessive processing and long runtimes when the file is opened. This issue is fixed in version 6.21.2.
- Product
- pypdf
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 23, 2026pypdf is a free and open-source pure-python PDF library.CVE-2026-115572 · Other software · py-pdf · reported by GitHubHigh 7.1
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.2, an attacker can craft a PDF that repeatedly references the same nonexistent indirect object, causing relevant file parts such as pages to trigger repeated full-file recovery loads and long runtimes when accessed. This issue is fixed in version 6.21.2.
- Product
- pypdf
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 23, 2026An incomplete list of disallowed inputs in the Python code validator of the run_script tool in AWS MCP Server might allow an authenticated remote user to executCVE-2026-115845 · Other software · AWS · reported by ff89ba41-3aa1-4d27-914a-91399e9639e5Medium 5.3
An incomplete list of disallowed inputs in the Python code validator of the run_script tool in AWS MCP Server might allow an authenticated remote user to execute arbitrary code within their own isolated session environment via a crafted script. AWS fixed this issue service-side. No customer action is required.
- Product
- AWS MCP Server
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 23, 2026Hugging Face Datasets through 5.1.0 contains an insecure deserialization vulnerability that allows attackers to execute arbitrary Python code by crafting a maliCVE-2026-57845 · Other software · huggingface · reported by VulnCheckHigh 8.7
Hugging Face Datasets through 5.1.0 contains an insecure deserialization vulnerability that allows attackers to execute arbitrary Python code by crafting a malicious pickle file loaded through the deprecated pandas packaged builder. Attackers can supply a pickle-backed dataset that is processed by Pandas._generate_tables via pandas.read_pickle() without validation, so when a victim calls datasets.load_dataset("pandas", data_files=...), the embedded __reduce__ payload executes code with the victim process's privileges.
- Product
- datasets
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026Authlib is a Python library which builds OAuth and OpenID Connect servers.CVE-2026-114620 · Other software · authlib · reported by GitHubMedium 5.4
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, Authlib's RFC 9101 JWTAuthenticationRequest passes the unauthenticated, client-controlled request_uri parameter to the abstract get_request_object() hook before applying a destination or registration policy; the hook itself performs no network request, while the documentation demonstrates an unrestricted HTTP fetch. In deployments whose integrator implements that hook as an unrestricted outbound fetch, a remote attacker who knows a valid public client identifier can make the authorization server request internal, link-local, or otherwise unintended URLs and can distinguish fetch outcomes through different error responses and timing. Deployments whose custom hook already applies a secure allowlist, destination controls, and retrieval limits are not affected. The JWTAuthenticationRequest implementation in authlib/oauth2/rfc9101/authorization_server.py forwards request_uri to get_request_object() before an application-approved retrieval policy accepts the destination. This issue is fixed in version 1.9.0.
- Product
- authlib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026Authlib is a Python library which builds OAuth and OpenID Connect servers.CVE-2026-114619 · Other software · authlib · reported by GitHubMedium 4.6
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, OpenIDImplicitGrant.validate_authorization_request() checks the client-controlled raw request.payload.scope for openid after the parent grant has filtered allowed scopes into request.scope. A registered client permitted an ID token response type but not the openid scope can add openid to the request, obtain user consent, and receive a signed ID token containing the user's subject and allowed profile claims. Authorization code flow and deployments that allow openid for every client permitted an ID token response are not affected. In authlib/oidc/core/grants/implicit.py, OpenIDImplicitGrant.validate_authorization_request() checks request.payload.scope instead of the filtered request.scope. This issue is fixed in version 1.9.0.
- Product
- authlib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026Authlib is a Python library which builds OAuth and OpenID Connect servers.CVE-2026-114618 · Other software · authlib · reported by GitHubMedium 6.8
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, the default RFC 7523 JWTBearerGrant.get_audiences() returns an empty list, causing JWTBearerGrant.verify_claims() to require only that an aud claim exists without matching the current authorization server. An attacker holding a legitimate assertion for another service can present it to a server that shares the signing key and uses the default grant, obtaining an access token across a trust boundary. Implementations that override get_audiences() with the server's valid audience identifiers are not affected. This issue is fixed in version 1.9.0.
- Product
- authlib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026Authlib is a Python library which builds OAuth and OpenID Connect servers.CVE-2026-114617 · Other software · authlib · reported by GitHubMedium 4.2
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.0, OpenIDMixin.parse_id_token() reads the nonce_supported decision from the untrusted ID token being validated and sets the expected nonce to null when that claim is the JSON boolean false. In implicit and hybrid relying parties, or applications that directly accept externally supplied ID tokens, an attacker with a captured validly signed token can bypass the nonce-to-session binding and replay the victim's token into an attacker-controlled session. Plain authorization code flow is not affected, and the token must still pass signature, issuer, and audience validation. OpenIDMixin.parse_id_token() trusts nonce_supported in both authlib/integrations/base_client/sync_openid.py and authlib/integrations/base_client/async_openid.py to disable the expected nonce. This issue is fixed in version 1.9.0.
- Product
- authlib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026Authlib is a Python library which builds OAuth and OpenID Connect servers.CVE-2026-114616 · Other software · authlib · reported by GitHubHigh 7.4
Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.9.1, Authlib's OctKey.import_key() and HMAC signing and verification path accept zero-length key material. If an application's secret lookup can return an empty string or empty bytes, a remote attacker can compute the deterministic HS256, HS384, or HS512 signature for arbitrary token claims and have Authlib treat the token as authentic. This issue is fixed in version 1.9.1.
- Product
- authlib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026Authlib is a Python library which builds OAuth and OpenID Connect servers.CVE-2026-114615 · Other software · authlib · reported by GitHubHigh 7.4
Authlib is a Python library which builds OAuth and OpenID Connect servers. From 1.3.1 until 1.9.0, OctKey.import_key() checks asymmetric-key markers only at byte zero while Authlib's PEM loaders accept leading whitespace, comments, or a byte-order mark. In deployments that use the documented mixed algorithm registry and already configure verification with PEM or certificate bytes containing such a prefix, an unauthenticated attacker who knows those same public-key bytes can use them as an HMAC secret and forge HS256 tokens with arbitrary identity or authorization claims. This is a bypass of the remediation for CVE-2024-37568. The module-level jwt object reaches OctKey.import_key() in authlib/jose/rfc7518/oct_key.py, where POSSIBLE_UNSAFE_KEYS fails to identify prefixed asymmetric key material. This issue is fixed in version 1.9.0.
- Product
- authlib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026The A2A server component in Amazon Strands Agents SDK for Python before 1.43.0 and Amazon Strands Agents SDK for TypeScript before 1.5.0 does not properly isolaCVE-2026-115419 · Other software · AWS · reported by ff89ba41-3aa1-4d27-914a-91399e9639e5High 8.6
The A2A server component in Amazon Strands Agents SDK for Python before 1.43.0 and Amazon Strands Agents SDK for TypeScript before 1.5.0 does not properly isolate conversation state between callers. An authenticated remote user could read other tenants' conversation history and add persistent instructions that alter model behavior for subsequent callers via HTTP requests to the A2A endpoint using a different context_id. To mitigate this issue, users should upgrade to strands-agents 1.43.0 (Python) or @strands-agents/sdk 1.5.0 (TypeScript).
- Product
- strands-agents
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordaws.amazon.comgithub.com
Oct 22, 2026Authlib is a Python library which builds OAuth and OpenID Connect servers.CVE-2026-114614 · Other software · authlib · reported by GitHubLow 2.6
Authlib is a Python library which builds OAuth and OpenID Connect servers. From 0.13 until 1.8.0, authlib.common.security.is_secure_transport() uses a textual prefix comparison for loopback HTTP exemptions, so a URL whose userinfo begins with a loopback host can be accepted even when its parsed host is an external non-loopback system. An external party able to supply a URL to OIDC RP-Initiated Logout registration, authorization-server metadata validation, or another call site can bypass the TLS-required guard and cause cleartext redirection or acceptance of cleartext endpoints. The issue does not bypass redirect URI exact matching and does not by itself forge tokens or authenticate users. The vulnerable authlib.common.security.is_secure_transport() implementation in authlib/common/security.py misinterprets the userinfo component before OIDC RP-Initiated Logout dynamic client registration and other consumers enforce transport security. This issue is fixed in version 1.8.0.
- Product
- authlib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026tarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outsidCVE-2026-114583 · Other software · Python Software Foundation · reported by cna@python.orgMedium 6.9
tarfile.tar_filter could be bypassed using crafted link entries, including symlinks with empty or directory-like names, to redirect later archive members outside the intended extraction directory. This allowed a malicious tar archive to cause tarfile.extractall() with filter="tar" to write files outside the destination directory, subject to the permissions of the extracting process. This is the tarfile.tar_filter counterpart of CVE-2026-7774, which covered tarfile.data_filter.
- Product
- CPython
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026MessagePack is the serializer implementation for Python msgpack.org.CVE-2026-114613 · Other software · msgpack · reported by GitHubHigh 7.5
MessagePack is the serializer implementation for Python msgpack.org. Prior to 1.2.3, the msgpack-python C extension (msgpack._cmsgpack) leaks a decoded map value when deserialization rejects a key with strict_map_key=True (the default). Repeated malformed inputs can cause unbounded process memory growth and denial of service in applications that deserialize attacker-controlled MessagePack data. Both unpackb() and the streaming Unpacker API are affected. The pure-Python fallback does not exhibit this leak in the reported tests. This issue is fixed in version 1.2.3.
- Product
- msgpack-python
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026fpdf2 is a PDF creation library for Python.CVE-2026-114610 · Other software · py-pdf · reported by GitHubMedium 6.5
fpdf2 is a PDF creation library for Python. From 2.5.0 until 2.8.8, fpdf2's SVGObject.build_xref() passes nested SVG <use> references to GraphicsContext.add_item(), whose default clone=True deep-copy behavior copies the complete referenced graphics tree during FPDF.image() processing. Repeating references at each nesting level makes the in-memory object count and processing work grow exponentially, allowing a small user-controlled SVG to consume excessive CPU and memory, raise MemoryError, fail PDF generation jobs, and reduce or exhaust worker capacity. ResourceAccessPolicy does not prevent the issue because the references are inline and require no external resource, XML entity, local file, or permissive network setting. This issue is fixed in version 2.8.8.
- Product
- fpdf2
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026fpdf2 is a PDF creation library for Python.CVE-2026-114609 · Other software · py-pdf · reported by GitHubMedium 5.8
fpdf2 is a PDF creation library for Python. Prior to 2.8.8, fpdf2's shared image loader automatically dereferences attacker-controlled HTTP(S) URLs and raw local paths supplied through FPDF.image(), FPDF.write_html() HTML <img src> values, SVG <image href> or xlink:href values, and template image fields. This can cause outbound requests to attacker-selected internal or external services and local file open attempts, although local content is exposed only when it is a valid supported image or SVG resource. file:// URLs are not specially handled, so the local-path case requires a raw filesystem path. This issue is fixed in version 2.8.8.
- Product
- fpdf2
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026GraphQL-core is a Python port of the GraphQL.js reference implementation.CVE-2026-75508 · Other software · graphql-python · reported by GitHubHigh 7.5
GraphQL-core is a Python port of the GraphQL.js reference implementation. From 3.2.3 until 3.2.12 and 3.3.0rc1, the parser's max_tokens limit in Parser.advance_lexer counts only non-comment tokens returned after Lexer.lookahead skips comments. Each skipped comment is still allocated as a Token and retained through token.next and token.prev, allowing a highly compressible comment-padded GraphQL document to pass a low token limit while consuming memory. An unauthenticated remote attacker can exhaust worker memory before AST-based depth or complexity controls run. This issue is fixed in versions 3.2.12 and 3.3.0rc1.
- Product
- graphql-core
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026GraphQL-core is a Python port of the GraphQL.js reference implementation.CVE-2026-75507 · Other software · graphql-python · reported by GitHubHigh 7.5
GraphQL-core is a Python port of the GraphQL.js reference implementation. From 3.0.0 until 3.2.12 and 3.3.0rc1, the OverlappingFieldsCanBeMerged rule in specified_rules repeatedly compares fields that share response names and recursively re-compares flattened inline fragments during the validation phase. The prior named-fragment memoization does not cover this path, so nested repeated inline fragments can drive quadratic and worst-case O(n²·m²) CPU work before any resolver or AST-based depth or complexity control runs. An unauthenticated remote attacker can submit a shallow, highly compressible GraphQL query that pins a worker process and can saturate a multi-worker service. This issue is fixed in versions 3.2.12 and 3.3.0rc1.
- Product
- graphql-core
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026Pylint is a static code analyser for Python.CVE-2026-114608 · Other software · pylint-dev · reported by GitHubMedium 5.4
Pylint is a static code analyser for Python. From 0.15.2 until 4.0.9, Pylint stores module statistics in predictable files under PYLINT_HOME and loads those files with pickle.load on a later run. An attacker who can write to a shared, group-writable, or otherwise untrusted cache directory can replace a stats cache with crafted serialized data, causing arbitrary code to execute with the privileges of the user who next runs Pylint. The default per-user cache is not normally writable by another user. This issue is fixed in version 4.0.9.
- Product
- pylint
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026dnspython is a DNS toolkit for Python.CVE-2026-114605 · Other software · rthalley · reported by GitHubHigh 7.5
dnspython is a DNS toolkit for Python. Prior to 2.9.0, dns.name.from_wire_parser follows attacker-controlled DNS compression pointer chains without a hop limit. A malicious DNS wire-format message can force excessive pointer traversal during name decompression, causing high CPU use, application degradation, or denial of service in applications that process untrusted DNS messages. This issue is fixed in version 2.9.0.
- Product
- dnspython
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026OpenTelemetry Python provides the Python API and SDK for OpenTelemetry.CVE-2026-114603 · Other software · open-telemetry · reported by GitHubMedium 5.3
OpenTelemetry Python provides the Python API and SDK for OpenTelemetry. Prior to 1.45.1, the opentelemetry-api function TraceState.from_header in opentelemetry/trace/span.py, reached through TraceContextTextMapPropagator.extract, parses inbound W3C tracestate headers with an unbounded optional-whitespace regular expression. A malformed header containing a long run of spaces or tabs without a following comma causes quadratic backtracking before the member-count limit is applied. Services using the default W3C Trace Context propagator can therefore spend excessive CPU time on one unauthenticated request when the HTTP server, parser, gateway, or custom carrier accepts a sufficiently large header. The processing can occupy a synchronous worker or delay unrelated requests on the same asynchronous event loop. The impact is limited to availability and does not expose or modify telemetry data or allow code execution. This issue is fixed in version 1.45.1.
- Product
- opentelemetry-python
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 22, 2026Flexible GraphRAG is a Python framework for building graph and retrieval-augmented generation applications across multiple graph, vector, and search backends.CVE-2026-114510 · Other software · stevereiner · reported by GitHubHigh 7.1
Flexible GraphRAG is a Python framework for building graph and retrieval-augmented generation applications across multiple graph, vector, and search backends. From 0.6.0 until 0.8.2, the _escape() helper in flexible-graphrag/langchain/graph/pg_store_adapters/falkordb_adapter.py escapes quotes before backslashes and then interpolates the result into Cypher assembled by FalkorDBAdapter.add_graph_documents, allowing an inserted escape to be doubled and a quote to terminate the string early. When GRAPH_BACKEND=langchain and GRAPH_DB=falkordb are configured, attacker-influenced ingested document content can cause the extraction model to produce malicious entity or relationship values that reach these queries, allowing injected Cypher clauses to modify or delete graph data and, when the calling code surfaces query results to the user or LLM, disclose graph data. Dynamic node and relationship type identifiers are also inserted into backtick-quoted query positions without safe parameterization. The LlamaIndex FalkorDB store is not affected. This issue is fixed in version 0.8.2.
- Product
- flexible-graphrag
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 21, 2026Pillow is a Python imaging library.CVE-2026-114501 · Other software · python-pillow · reported by GitHubMedium 6.3
Pillow is a Python imaging library. From 11.2.1 until 13.0.0, Arrow export assumes that an image's rows are tightly contiguous and exports from im->blocks[0].ptr even when PILLOW_ALIGNMENT makes aligned_linesize include row padding or an aligned offset before the first row. The resulting Arrow buffer can include uninitialized padding, bytes preceding the first row, or stale heap contents from previously freed images. Applications that configure alignment and export images to Arrow can therefore disclose one user's pixels or other process memory to another user. This issue is fixed in version 13.0.0.
- Product
- Pillow
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 21, 2026Pillow is a Python imaging library.CVE-2026-96778 · Other software · python-pillow · reported by GitHubHigh 7.7
Pillow is a Python imaging library. From 9.4.0 until 13.0.0, ImagingJpegEncode() in src/libImaging/JpegEncode.c can call jpeg_write_marker() for a JPEG COM comment when an ICC profile has exactly filled the 65536-byte encoder buffer. libjpeg writes one byte before checking the exhausted free_in_buffer counter, which then wraps and permits the attacker-controlled comment and subsequent compressed image data to overwrite adjacent heap memory. Re-saving an untrusted image as JPEG while preserving its ICC profile and forwarded comment can crash the process and may enable code execution in suitable runtime and heap layouts. This issue is fixed in version 13.0.0.
- Product
- Pillow
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.
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