Description
GitLab has remediated an issue in GitLab EE affecting all versions from 18.8 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1 that, under certain conditions, could have allowed an authenticated user to cause specific Duo AI workflows to run under another user's identity due to improper user identity resolution when triggering Duo AI workflow runners.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GitLab | GitLab | 18.8 – < 18.10.7, 18.11 – < 18.11.4, 19.0 – < 19.0.1 | 18.10.7 |
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
- NCSC-2026-0168 Kwetsbaarheden verholpen in GitLab Community Edition en Enterprise Edition NCSC-NL (Netherlands) · May 28, 2026
- WID-SEC-2026-1704 GitLab: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 27, 2026
References
- https://gitlab.com/gitlab-org/gitlab/-/work_items/594809
- HackerOne Bug Bounty Report #3619872 technical-description exploit permissions-required
- https://about.gitlab.com/releases/2026/05/27/patch-release-gitlab-19-0-1-released/