Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.1 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have allowed an authenticated user to bypass WebAuthn two-factor authentication by manipulating the session state under certain conditions.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GitLab | GitLab | 13.1 – < 18.4.6, 18.5 – < 18.5.4, 18.6 – < 18.6.2 | 18.4.6 |
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-2025-2822 GitLab: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 11, 2025
- NCSC-2025-0390 Kwetsbaarheden verholpen in GitLab CE/EE NCSC-NL (Netherlands) · Dec 11, 2025
References
- GitLab Issue #577847 issue-tracking permissions-required
- HackerOne Bug Bounty Report #3322714 technical-description exploit permissions-required
- https://about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-released/