Vulnerability · Published Apr 22, 2026 · Assigned by GitLab
CVE-2025-9957Incorrect Authorization in GitLab
Low 2.7
In plain English
A low-severity incorrect authorization in GitLab from GitLab. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).
Severity (CVSS 3.1)2.7Low
Exploit odds (30 days)0.4%top 67.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
References
- HackerOne Bug Bounty Report #3275222 technical-description, exploit, permissions-required
- https://gitlab.com/gitlab-org/gitlab/-/work_items/567781
- https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/