CVE-2026-47838

EUVD-2026-35911
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.8 MEDIUM
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 1%
Affected Products (NVD)
VendorProductVersion
vmwarespring_security
𝑥
< 5.7.25
vmwarespring_security
5.8.0 ≤
𝑥
< 5.8.27
vmwarespring_security
6.3.0 ≤
𝑥
< 6.3.18
vmwarespring_security
6.4.0 ≤
𝑥
< 6.4.18
vmwarespring_security
6.5.0 ≤
𝑥
< 6.5.11
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://spring.io/security/cve-2026-47838