CVE-2026-47838

MEDIUM

Unauthorized User Impersonation when Using X.509 Client Certificates

Title source: cna

Description

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.

References (1)

Core 1

Core References

https://spring.io/security/cve-2026-47838

Scores

CVSS v3 6.8

EPSS 0.0011

EPSS Percentile 1.8%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-287

Status published

Products (5)

Spring/Spring Security 5.7.0 - 5.7.25

Spring/Spring Security 5.8.0 - 5.8.27

Spring/Spring Security 6.3.0 - 6.3.18

Spring/Spring Security 6.4.0 - 6.4.18

Spring/Spring Security 6.5.0 - 6.5.11

Published Jun 10, 2026

Tracked Since Jun 10, 2026