CVE-2023-52892: Phpseclib

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Phpseclib Phpseclib: from 1.0.0, before 1.0.22 (fixed in 1.0.22); from 2.0.0, before 2.0.46 (fixed in 2.0.46); from 3.0.0, before 3.0.33 (fixed in 3.0.33)

Published 2024-06-27. Last modified 2026-06-17.