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.
12 results
Sep 1, 2026phpseclib is a PHP secure communications library.CVE-2026-84308 · Email & office · phpseclib · reported by GitHubMedium 6.3
phpseclib is a PHP secure communications library. Prior to 3.0.57 and 4.0.1, pure-PHP X25519 scalar multiplication in phpseclib/Math/PrimeField/Integer.php performs data-dependent conditional modular reductions in add() and subtract(). During the Montgomery ladder in phpseclib/Crypt/EC/BaseCurves/Montgomery.php, the reduction behavior of each step depends on the secret scalar prefix, creating per-step timing and libgmp call-count observations that can reveal a reused 251-bit clamped private scalar. The phpseclib/Crypt/EC/Formats/Keys/MontgomeryPrivate.php derivation path invokes the pure-PHP multiplication without a native-engine check, while phpseclib/Crypt/EC/Formats/Keys/PKCS8.php reaches it when ext-sodium is unavailable. Exploitation requires a reused or long-lived X25519 private key, knowledge of the corresponding public key, execution of the pure-PHP path, and a local observer capable of resolving individual ladder steps or libgmp entry-point calls. Ephemeral X25519 keys, including phpseclib's normal SSH exchange path, are not affected. Recovery of the scalar permanently compromises operations that reuse that key. This issue is fixed in versions 3.0.57 and 4.0.1.
- Product
- phpseclib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 22, 2026phpseclib is a PHP secure communications library.CVE-2026-55599 · Websites & servers · phpseclib · reported by GitHubMedium 5.8
phpseclib is a PHP secure communications library. From 0.1.1 until 1.0.30, 2.0.55, and 3.0.54, when an application validates an untrusted X.509 certificate with phpseclib, X509::validateSignature() reads a URL out of that certificate's Authority Information Access (AIA) extension and connects to it. Attacker who supplies certificate fully controls host, port, and path of that connection. URL fetching is enabled by default, and no destination is blocked. An unauthenticated attacker can therefore make a validating server open connections to internal hosts and ports it should never reach, for example loopback 127.0.0.1, cloud metadata address 169.254.169.254, and internal-only services. This is a server-side request forgery (SSRF) caused by an insecure default. This vulnerability is fixed in 1.0.30, 2.0.55, and 3.0.54.
- Product
- phpseclib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
May 12, 2026phpseclib is a PHP secure communications library.CVE-2026-44167 · Websites & servers · phpseclib · reported by GitHubHigh 7.5
phpseclib is a PHP secure communications library. Prior to 1.0.29, 2.0.54, and 3.0.52, anyone loading untrusted ASN1 files (eg. X509 certificates, RSA PKCS8 private or public keys, etc). This is a bypass of CVE-2024-27355. This vulnerability is fixed in 1.0.29, 2.0.54, and 3.0.52.
- Product
- phpseclib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 10, 2026phpseclib is a PHP secure communications library.CVE-2026-40194 · Websites & servers · phpseclib · reported by GitHubLow 3.7
phpseclib is a PHP secure communications library. Starting in 0.1.1 and prior to 3.0.51, 2.0.53, and 1.0.28, phpseclib\Net\SSH2::get_binary_packet() uses PHP's != operator to compare a received SSH packet HMAC against the locally computed HMAC. != on equal-length binary strings in PHP uses memcmp(), which short-circuits on the first differing byte. This is a real variable-time comparison (CWE-208), proven by scaling benchmarks. This vulnerability is fixed in 3.0.51, 2.0.53, and 1.0.28.
- Product
- phpseclib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Mar 19, 2026phpseclib is a PHP secure communications library.CVE-2026-32935 · Websites & servers · phpseclib · reported by GitHubHigh 8.2
phpseclib is a PHP secure communications library. Projects using versions 0.1.1 through 1.0.26, 2.0.0 through 2.0.51, and 3.0.0 through 3.0.49 are vulnerable to a to padding oracle timing attack when using AES in CBC mode. This issue has been fixed in versions 1.0.27, 2.0.52 and 3.0.50.
- Product
- phpseclib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Jun 27, 2024In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in Subject Alternative Name fields in TLS certificates are incorrectly allCVE-2023-52892 · Websites & servers · phpseclib · reported by MITREHigh 7.5
In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in Subject Alternative Name fields in TLS certificates are incorrectly allowed to have a special meaning in regular expressions (such as a + wildcard), leading to name confusion in X.509 certificate host verification.
- Product
- phpseclib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Mar 1, 2024An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36.CVE-2024-27355 · Websites & servers · phpseclib · reported by MITREHigh 7.5
An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. When processing the ASN.1 object identifier of a certificate, a sub identifier may be provided that leads to a denial of service (CPU consumption for decodeOID).
- Product
- phpseclib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgist.github.comgithub.com
Mar 1, 2024An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36.CVE-2024-27354 · Websites & servers · phpseclib · reported by MITREHigh 7.5
An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. An attacker can construct a malformed certificate containing an extremely large prime to cause a denial of service (CPU consumption for an isPrime primality check). NOTE: this issue was introduced when attempting to fix CVE-2023-27560.
- Product
- 1x
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgist.github.comgithub.com
Nov 27, 2023In Math/BinaryField.php in phpseclib 3 before 3.0.34, excessively large degrees can lead to a denial of service.CVE-2023-49316 · Websites & servers · Phpseclib · reported by MITREHigh 7.5
In Math/BinaryField.php in phpseclib 3 before 3.0.34, excessively large degrees can lead to a denial of service.
- Product
- Phpseclib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Mar 3, 2023Math/PrimeField.php in phpseclib 3.x before 3.0.19 has an infinite loop with composite primefields.CVE-2023-27560 · Websites & servers · Phpseclib · reported by MITREHigh 7.5
Math/PrimeField.php in phpseclib 3.x before 3.0.19 has an infinite loop with composite primefields.
- Product
- Phpseclib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Apr 6, 2021phpseclib before 2.0.31 and 3.x before 3.0.7 mishandles RSA PKCS#1 v1.5 signature verification.CVE-2021-30130 · Websites & servers · Phpseclib · reported by MITREHigh 7.5
phpseclib before 2.0.31 and 3.x before 3.0.7 mishandles RSA PKCS#1 v1.5 signature verification.
- Product
- Phpseclib
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Feb 19, 2016phpMyAdmin 4.4.x before 4.4.15.3 and 4.5.x before 4.5.4 allows remote attackers to obtain sensitive information via a crafted request to (1) libraries/phpseclibCVE-2016-2042 · Other software · Opensuse · reported by MITREMedium 5.3
phpMyAdmin 4.4.x before 4.4.15.3 and 4.5.x before 4.5.4 allows remote attackers to obtain sensitive information via a crafted request to (1) libraries/phpseclib/Crypt/AES.php or (2) libraries/phpseclib/Crypt/Rijndael.php, which reveals the full path in an error message.
- Product
- Leap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordlists.fedoraproject.orglists.fedoraproject.org
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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