Auth Bypass via Group Fork Prevention in GitLab CE/EE 11.2+ to 18.11.1
CVE-2025-9957 Published on April 22, 2026
Incorrect Authorization in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.2 before 18.9.6, 18.10 before 18.10.4, and 18.11 before 18.11.1 that under certain conditions could have allowed an authenticated user with project owner permissions to bypass group fork prevention settings due to improper authorization checks.
Vulnerability Analysis
CVE-2025-9957 can be exploited with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2025-9957. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity, and no impact on availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2025-9957 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2025-9957
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Affected Versions
GitLab:- Version 11.2 and below 18.9.6 is affected.
- Version 18.10 and below 18.10.4 is affected.
- Version 18.11 and below 18.11.1 is affected.