USN-8830-1 php-phpseclib vulnerabilities

It was discovered that phpseclib did not perform constant-time padding validation when using AES in CBC mode. A remote attacker could possibly use this issue to obtain sensitive information. CVE-2026-32935 It was discovered that phpseclib did not use a constant-time comparison when validating SSH...

USN-8830-1: phpseclib vulnerabilities

It was discovered that phpseclib did not perform constant-time padding validation when using AES in CBC mode. A remote attacker could possibly use this issue to obtain sensitive information. CVE-2026-32935 It was discovered that phpseclib did not use a constant-time comparison when validating SSH...

PHPseclib SSRF

The vulnerability of the PHPseclib cryptographic protocol interpreter library is related to insufficient validation of requests on the server side. Exploiting this vulnerability allows a malicious actor to perform a SSRF attack remotely...

PHP-phpseclib Uncontrolled Resource Consumption DoS

The vulnerability of the PHP-phpseclib interpreter is related to an uncontrolled consumption of resources. Exploiting this vulnerability can allow a malicious actor to cause service failures...

PHP-phpseclib Time Mismatch Unauthorized Access

The vulnerability of the PHP-phpseclib interpreter lies in manipulating an unknown input, which leads to a time mismatch vulnerability. Exploiting this vulnerability can allow an attacker, operating remotely, to gain unauthorized access to protected information...

Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 22.04 LTS : phpseclib vulnerability (USN-8769-1)

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8769-1 advisory. It was discovered that phpseclib did not perform padding validation in constant...

USN-8769-1 phpseclib vulnerability

It was discovered that phpseclib did not perform padding validation in constant time when using AES in CBC mode. A remote attacker could possibly use this issue to conduct a padding oracle timing attack and obtain sensitive information...

USN-8769-1: phpseclib vulnerability

It was discovered that phpseclib did not perform padding validation in constant time when using AES in CBC mode. A remote attacker could possibly use this issue to conduct a padding oracle timing attack and obtain sensitive information...

CVE-2026-84308

A flaw was found in phpseclib, a PHP secure communications library. This vulnerability arises from non-constant-time X25519 scalar multiplication, where data-dependent conditional modular reductions create observable timing differences or variations in libgmp call counts. A local attacker, capabl...

phpseclib — non-constant-time X25519 scalar multiplication permits full private-key recovery

The pure-PHP X25519 scalar multiplication in phpseclib is not constant-time. Field addition and subtraction each perform a data-dependent conditional modular reduction, so the cost of each Montgomery-ladder step is a linear function of that step's reduction count which is a quantity determined by...

GHSA-Q97C-8QH3-FPC6 phpseclib — non-constant-time X25519 scalar multiplication permits full private-key recovery

The pure-PHP X25519 scalar multiplication in phpseclib is not constant-time. Field addition and subtraction each perform a data-dependent conditional modular reduction, so the cost of each Montgomery-ladder step is a linear function of that step's reduction count which is a quantity determined by...

EUVD-2026-69576

phpseclib — non-constant-time X25519 scalar multiplication permits full private-key recovery...

ROS-20260904-73-0007

The vulnerability in php-phpseclib is related to an uncontrolled resource consumption. Exploiting this vulnerability can allow a malicious actor to cause service failures...

ROS-20260904-73-0006

The vulnerability in php-phpseclib is related to manipulating an unknown input, resulting in a time mismatch. Exploiting this vulnerability can allow an attacker, operating remotely, to gain unauthorized access to protected information...

Linux Distros Unpatched Vulnerability : CVE-2026-84308

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

Timing Attack

Overview phpseclib/phpseclib is a PHP Secure Communications Library - Pure-PHP implementations of RSA, AES, SSH2, SFTP, X.509 etc. Affected versions of this package are vulnerable to Timing Attack the pure-PHP X25519 scalar multiplication in Crypt/EC/Formats/Keys/MontgomeryPrivate.php,...

CVE-2026-84308

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...

DEBIAN-CVE-2026-84308

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...

CVE-2026-84308

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...

UBUNTU-CVE-2026-84308

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...