CVE-2026-40194 phpseclib has a variable-time HMAC comparison in SSH2::get_binary_packet() using != instead of hash_equals()

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::getbinarypacket 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,...

CVE-2026-40194

CVE-2026-40194 affects the phpseclib PHP secure communications library. Prior to versions 3.0.51, 2.0.53, and 1.0.28, phpseclib\Net\SSH2::get_binary_packet() compares the received SSH packet HMAC to the computed HMAC using the != operator. In PHP, != on equal-length binary strings invokes memcmp(...

PT-2026-32042

Name of the Vulnerable Software and Affected Versions: phpseclib versions 1.0 through 3.0.50 Description: phpseclib versions prior to 3.0.51, 2.0.53, and 1.0.28 have a timing issue in the phpseclibNetSSH2::get binary packet function. The use of PHP's != operator for comparing SSH packet HMACs...

phpseclib security vulnerability

phpseclib is an open-source PHP security communication library developed by phpseclib. Versions prior to 3.0.51, 2.0.53, and 1.0.28 have security vulnerabilities. These vulnerabilities stem from the use of the PHP “!” operator in phpseclib’s NetSSH2::getbinarypacket function, which compares the...

CVE-2026-40194: Observable Timing Discrepancy

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::getbinarypacket 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,...

phpseclib Information Disclosure

The vulnerability of the phpseclib cryptographic protocol library is related to the disclosure of information due to timing mismatches. Exploiting this vulnerability could allow a malicious actor, operating remotely, to gain unauthorized access to protected information...

Debian: Security Advisory (DLA-4518-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

[SECURITY] Fedora 42 Update: php-phpseclib3-3.0.50-1.fc42

MIT-licensed pure-PHP implementations of an arbitrary-precision integer arithmetic library, fully PKCS1 v2.1 compliant RSA, DES, 3DES, RC4, Rijndael, AES, Blowfish, Twofish, SSH-1, SSH-2, SFTP, and X.509...

[SECURITY] [DLA 4518-1] phpseclib security update

----------------------------------------------------------------------- Debian LTS Advisory DLA-4518-1 [email protected] https://www.debian.org/lts/security/ Utkarsh Gupta March 30, 2026 https://wiki.debian.org/LTS -...

[SECURITY] Fedora 43 Update: php-phpseclib3-3.0.50-1.fc43

MIT-licensed pure-PHP implementations of an arbitrary-precision integer arithmetic library, fully PKCS1 v2.1 compliant RSA, DES, 3DES, RC4, Rijndael, AES, Blowfish, Twofish, SSH-1, SSH-2, SFTP, and X.509...

Debian dla-4518 : php-seclib - security update

The remote Debian 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-4518 advisory. - ----------------------------------------------------------------------- Debian LTS Advisory DLA-4518-1 [email protected]...

DLA-4518-1 phpseclib - security update

Bulletin has no description...

Debian: Security Advisory (DSA-6185-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Debian: Security Advisory (DSA-6186-1)

The remote host is missing an update for the Debian SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Fedora: Security Advisory (FEDORA-2026-d1feefa819)

The remote host is missing an update for the SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Fedora: Security Advisory (FEDORA-2026-bfeb46516b)

The remote host is missing an update for the SPDX-FileCopyrightText: 2026 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Fedora 43 : php-phpseclib3 (2026-b7d9416ec4)

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-b7d9416ec4 advisory. Update to v3.0.50; contains fix for CVE-2026-32935 Tenable has extracted the preceding description block directly from the Fedora security advisory. Note tha...

[SECURITY] [DSA 6187-1] php-phpseclib3 security update

------------------------------------------------------------------------- Debian Security Advisory DSA-6187-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff March 29, 2026 https://www.debian.org/security/faq -...

[SECURITY] [DSA 6186-1] php-phpseclib security update

------------------------------------------------------------------------- Debian Security Advisory DSA-6186-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff March 29, 2026 https://www.debian.org/security/faq -...

[SECURITY] [DSA 6185-1] phpseclib security update

------------------------------------------------------------------------- Debian Security Advisory DSA-6185-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff March 29, 2026 https://www.debian.org/security/faq -...