Main Vulnerability Database Vulnerabilities #VU115150

Input validation error in Gitlab Community Edition and GitLab Enterprise Edition - CVE-2025-2256

Published: September 11, 2025

Vulnerability identifier: #VU115150

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-2256

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in SAML responses. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Affected software

Gitlab Community Edition
GitLab Enterprise Edition

How to mitigate CVE-2025-2256

Install updates from vendor's website.

Gitlab Community Edition - addressed in versions 18.1.6, 18.2.6, 18.3.2
GitLab Enterprise Edition - addressed in versions 18.1.6, 18.2.6, 18.3.2

External References

https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/

Related Security Bulletins