Feed/CVE-2026-47838
CVE-2026-47838MEDIUMCVSS 6.8

Spring Security Vulnerable to Unauthorized User Impersonation when Using X.509 Client Certificates

Published Jun 10, 2026·Updated Jun 30, 2026

NVD Description

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. `SubjectDnX509PrincipalExtractor` is deprecated by this CVE and replaced with `SubjectX500PrincipalExtractor`. As part of updating, you should also migrate to `SubjectX500PrincipalExtractor`. Affected versions: Spring Security Enterprise 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. OSS 6.5.0 through 6.5.10.

Affected Packages (1)

org.springframework.security:spring-security-webMAVEN
From 6.5.0
Fixed in = 6.5.10

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

References

View on NVD Search GitHub Search Google

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