CVE-2026-47838 — Unauthorized User Impersonation when Using X.509 Client Certificates
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 careful…
Published: 2026-06-09 · CVSS: 6.8 · CVSS 3.1
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 5.7.0 through 5.7.24; 5.8.0 through 5.8.26; 6.3.0 through 6.3.17; 6.4.0 through 6.4.17; 6.5.0 through 6.5.10.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7