CVE-2026-22747 MEDIUM

CVE-2026-22747: Unauthorized User Impersonation when Using X.509 Client Certificates

Vendor Spring
Product Spring Security
Published April 22, 2026
Last update June 30, 2026
View on NVD All CVEs

CVSS base score

6.8/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

Vulnerability in Spring Spring Security. SubjectX500PrincipalExtractor 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. This issue affects Spring Security: from 7.0.0 through 7.0.4.

Key dates

02Disclosure timeline

April 22, 2026 CVE published
June 30, 2026 Record updated