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CVE PROGRAM SOURCE RECORD9.1 Critical

CVE-2026-45063

Symfony: Identity Spoofing via Unanchored DN Regex in X509Authenticator

Description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, X509Authenticator extracts the user identifier from $_SERVER['SSL_CLIENT_S_DN'] with an unanchored regex that matches emailAddress= anywhere in the distinguished name, allowing an attacker with a trusted certificate containing emailAddress=victim inside another RDN value such as CN to authenticate as the victim. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

symfony symfony

  • < 5.4.52affected
  • >= 6.0.0-BETA1, < 6.4.40affected
  • >= 7.0.0-BETA1, < 7.4.12affected
  • >= 8.0.0-BETA1, < 8.0.12affected

References