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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GitLab | GitLab | 12.1 – < 17.10.7, 17.11 – < 17.11.3, 18.0 – < 18.0.1 | 17.10.7 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | gitlab | No fix yet | — |
Advisories 2
- NCSC-2025-0176 Kwetsbaarheden verholpen in GitLab NCSC-NL (Netherlands) · May 23, 2025
- WID-SEC-2025-1117 GitLab: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 22, 2025
References
- GitLab Issue #493942 issue-tracking permissions-required
- HackerOne Bug Bounty Report #2705566 technical-description exploit permissions-required