Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GitLab | GitLab | 18.10 – < 18.10.4, 18.11 – < 18.11.1 | 18.10.4 |
Advisories 2
- NCSC-2026-0128 Kwetsbaarheden verholpen in GitLab EE en CE NCSC-NL (Netherlands) · Apr 23, 2026
- WID-SEC-2026-1245 GitLab: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 22, 2026
References
- HackerOne Bug Bounty Report #3572231 technical-description exploit permissions-required
- https://gitlab.com/gitlab-org/gitlab/-/work_items/592816
- https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/