GHSA-293Q-567P-WMWQ Spring Security Vulnerable to Unauthorized User Impersonation when Using X.509 Client Certificates

In Spring Security Web, SubjectDnX509PrincipalExtractor 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...