Input validation error in Spring Security - CVE-2026-22747

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Main Vulnerability Database Vulnerabilities #VU128228

Input validation error in Spring Security - CVE-2026-22747

Published: April 27, 2026


Vulnerability identifier: #VU128228
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-22747
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Spring Security
Software vendor:
VMware, Inc

Description

The vulnerability allows a remote user to impersonate another user.

The vulnerability exists due to improper input validation in SubjectX500PrincipalExtractor when processing malformed X.509 certificate CN values. A remote user can present a carefully crafted certificate to impersonate another user.

Exploitation presupposes compromise of a trusted upstream that validates the presented credentials in the pre-authentication flow.


Remediation

Install security update from vendor's website.

External links