Description
A business logic error in GitLab CE/EE affecting all versions starting from 12.1 prior to 17.10.7, 17.11 prior to 17.11.3 and 18.0 prior to 18.0.1 where an attacker can cause a branch name confusion in confidential MRs.
Problem types
CWE-451: User Interface (UI) Misrepresentation of Critical Information
Product status
12.1 (semver) before 17.10.7
17.11 (semver) before 17.11.3
18.0 (semver) before 18.0.1
Credits
Thanks [foxribeye](https://hackerone.com/foxribeye) for reporting this vulnerability through our HackerOne bug bounty program
References
gitlab.com/gitlab-org/gitlab/-/issues/493942 (GitLab Issue #493942)
hackerone.com/reports/2705566 (HackerOne Bug Bounty Report #2705566)
Data based on CVE®. Copyright © 1999-2025, The MITRE Corporation. All rights reserved.