Improper access control in Gitlab Community Edition and GitLab Enterprise Edition - CVE-2025-9957

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Main Vulnerability Database Vulnerabilities #VU131662

Improper access control in Gitlab Community Edition and GitLab Enterprise Edition - CVE-2025-9957

Published: May 18, 2026


Vulnerability identifier: #VU131662
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-9957
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: GitLab, Inc
Affected software:
Gitlab Community Edition
GitLab Enterprise Edition

Detailed vulnerability description

The vulnerability allows a remote user to bypass group fork prevention settings.

The vulnerability exists due to improper access control in project fork relationship API when processing fork relationship requests. A remote privileged user can perform crafted API actions to bypass group fork prevention settings.

Exploitation requires project owner permissions.


How to mitigate CVE-2025-9957

Install security update from vendor's website.

Sources