CVE-2026-47838

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. Affected versions: Spring Security 5.7....

User Impersonation

Overview org.springframework.security:spring-security-config is a security configuration package for Spring Framework. Affected versions of this package are vulnerable to User Impersonation via username extraction in SubjectDnX509PrincipalExtractor. An attacker can impersonate another user by...