Timing Attack Affecting phpseclib/phpseclib package, versions <1.0.28>=2.0.0, <2.0.53>=3.0.0, <3.0.51
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Test your applications- Snyk IDSNYK-PHP-PHPSECLIBPHPSECLIB-15989082
- published12 Apr 2026
- disclosed10 Apr 2026
- creditkodareef5
Introduced: 10 Apr 2026
NewCVE-2026-40194 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade phpseclib/phpseclib to version 1.0.28, 2.0.53, 3.0.51 or higher.
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 via the get_binary_packet function. An attacker can potentially infer sensitive information about the HMAC value by measuring response times during SSH packet processing.