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: 5.1 [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]
CVE-ID: CVE-2025-9957
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Gitlab Community Edition
GitLab Enterprise Edition
GitLab Enterprise Edition
How to mitigate CVE-2025-9957
Install security update from vendor's website.
Gitlab Community Edition - addressed in versions 18.9.6, 18.10.4, 18.11.1
GitLab Enterprise Edition - addressed in versions 18.9.6, 18.10.4, 18.11.1
GitLab Enterprise Edition - addressed in versions 18.9.6, 18.10.4, 18.11.1