CVE-2026-47838mediumCWE-287

CVE-2026-47838: medium-severity vulnerability in Spring Security

Unauthorized User Impersonation when Using X.509 Client Certificates

Published · Updated

Follow this CVE+ Monitor Spring Security+ Monitor org.springframework.security:spring-security-web

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.8epss 0.1%
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.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Affected products
Spring · Spring Security
Related CVEs — Spring Security

In the same product, most dangerous first.

CVE-2019-3795LOWInsecure Randomness When Using a SecureRandom Instance Constructed by Spring SecurityEPSS 1.9%CVE-2019-11272—PlaintextPasswordEncoder authenticates encoded passwords that are nullEPSS 1.4%CVE-2024-22234HIGHCVE-2024-22234: Broken Access Control in Spring Security With Direct Use of isFullyAuthenticatedEPSS 0.7%CVE-2025-41232CRITICALCVE-2025-41232: Spring Security authorization bypass for method security annotations on private methodsEPSS 0.6%CVE-2025-22228HIGHCVE-2025-22228: Spring Security BCryptPasswordEncoder does not enforce maximum password lengthEPSS 0.6%CVE-2025-22223MEDIUMCVE-2025-22223EPSS 0.5%