Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions 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 – < 18.11.6, 19.0 – < 19.0.3, 19.1 – < 19.1.1 | 18.11.6 |
Advisories 2
- NCSC-2026-0211 Kwetsbaarheden verholpen in GitLab Community Edition en Enterprise Edition NCSC-NL (Netherlands) · Jun 25, 2026
- WID-SEC-2026-2070 GitLab CE/EE: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 24, 2026
References
- https://gitlab.com/gitlab-org/gitlab/-/work_items/601857
- HackerOne Bug Bounty Report #3688717 technical-description exploit permissions-required
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-1-released/