PT-2026-48333 · Spring · Spring Security

Published 2026-06-09 · Updated 2026-06-10 · CVE-2026-47838

Mitre

CVSS v3.1

6.8

Medium

Base vector

AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

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.

Fix

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

CVE-2026-47838

Affected Products

Spring Security

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-47838 · Security Note
• https://spring.io/security/cve-2026-47838 · Note