Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.6.5 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, an unauthenticated user could have retrieved sensitive internal server credentials due to improper filtering of internal response headers.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GitLab | GitLab | 17.6.5 – < 19.3.6, 19.4 – < 19.4.3, 19.5 – < 19.5.1 | 19.3.6 |
Advisories 2
- WID-SEC-2026-4115 GitLab: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 9, 2026
- NCSC-2026-0447 Kwetsbaarheden verholpen in GitLab door GitLab Inc. NCSC-NL (Netherlands) · Oct 22, 2026
References
- https://gitlab.com/gitlab-org/gitlab/-/work_items/597022
- HackerOne Bug Bounty Report #3657282 technical-description exploit permissions-required
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/