Authorization Flaw in GitLab CE/EE Affects Project Fork Settings
CVE-2025-9957

2.7LOW

Key Information:

Vendor

Gitlab
Status
Gitlab
Vendor
CVE Published:
22 April 2026

What is CVE-2025-9957?

An authorization flaw exists in GitLab CE/EE that impacts multiple versions, allowing users with project owner permissions to bypass group fork prevention settings. This weakness arises from inadequate authorization checks, which could permit unintended actions in the platform. Remedial measures have been implemented in later versions to mitigate these risks and strengthen project integrity, ensuring that users adhere to the established limitations and permissions around project forking.

Affected Version(s)

GitLab 11.2 < 18.9.6

GitLab 18.10 < 18.10.4

GitLab 18.11 < 18.11.1

References

https://hackerone.com/reports/3275222
technical-descriptionexploitpermissions-required
https://gitlab.com/gitlab-org/gitlab/-/work_items/567781
https://about.gitlab.com/releases/2026/04/22/patch-releas...

CVSS V3.1

Score:
2.7
Severity:
LOW
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Thanks [theluci](https://hackerone.com/theluci) for reporting this vulnerability through our HackerOne bug bounty program
.