GHSA-2jrg-rf5x-568gMediumCVSS 6.8

Spring Security Vulnerable to Unauthorized User Impersonation when Using X.509 Client Certificates

Published
April 22, 2026
Last Modified
April 29, 2026

🔗 CVE IDs covered (1)

📋 Description

Vulnerability in Spring Spring Security. SubjectX500PrincipalExtractor does not correctly handle certain malformed X.509 certificate CN values, which can lead to reading the wrong value for the username. In a carefully crafted certificate, this can lead to an attacker impersonating another user. This issue affects Spring Security: from 7.0.0 through 7.0.4.

🎯 Affected products1

  • maven/org.springframework.security:spring-security-web:>= 7.0.0, <= 7.0.4

🔗 References (4)