Description
GitLab has remediated an issue in GitLab EE affecting all versions from 13.11 before 18.11.7, 19.0 before 19.0.4, and 19.1 before 19.1.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary scripts in another user's browser session due to improper sanitization of user-supplied input.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GitLab | GitLab | 13.11 – < 18.11.7, 19.0 – < 19.0.4, 19.1 – < 19.1.2 | 18.11.7 |
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-2026-0222 Kwetsbaarheden verholpen in GitLab Enterprise Edition en Community Edition NCSC-NL (Netherlands) · Jul 10, 2026
- WID-SEC-2026-2265 GitLab: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 8, 2026
References
- https://gitlab.com/gitlab-org/gitlab/-/work_items/597887
- HackerOne Bug Bounty Report #3682085 technical-description exploit permissions-required
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-1-2-released/