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GHSA-2jrg-rf5x-568g

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

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-22747

Packages

EcosystemPackageAffectedFixed in
Maven org.springframework.security:spring-security-web >= 7.0.0, < 7.0.5 7.0.5

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.