Description
GitLab has remediated an issue in EE affecting all versions from 17.1 before 18.3.5, 18.4 before 18.4.3, and 18.5 before 18.5.1 that could have allowed an authenticated attacker with specific permissions to hijack project runners from other projects.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GitLab | GitLab | 17.1 – < 18.3.5, 18.4 – < 18.4.3, 18.5 – < 18.5.1 | 18.3.5 |
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
- WID-SEC-2025-2376 GitLab: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 28, 2025
- NCSC-2025-0342 Kwetsbaarheden verholpen in GitLab Enterprise en Community Edition NCSC-NL (Netherlands) · Oct 27, 2025
References
- https://about.gitlab.com/releases/2025/10/22/patch-release-gitlab-18-5-1-released/
- GitLab Issue #576900 issue-tracking permissions-required
- HackerOne Bug Bounty Report #3356284 technical-description exploit permissions-required