Description
An issue has been discovered in GitLab CE/EE affecting all versions from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed unauthorized users to render the GitLab instance unresponsive to legitimate users by sending multiple concurrent large SAML responses.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GitLab | GitLab | 7.12 – < 18.1.6, 18.2 – < 18.2.6, 18.3 – < 18.3.2 | 18.1.6 |
Advisories 2
- NCSC-2025-0288 Kwetsbaarheden verholpen in GitLab CE/EE NCSC-NL (Netherlands) · Sep 12, 2025
- WID-SEC-2025-2024 GitLab: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 11, 2025
References
- https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/
- GitLab Issue #524633 issue-tracking permissions-required
- HackerOne Bug Bounty Report #3019485 technical-description exploit permissions-required