Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 14.0 before 19.0.5, 19.1 before 19.1.3, and 19.2 before 19.2.1 that under certain conditions could have allowed an attacker to execute arbitrary JavaScript in another user's browser via a crafted URL, due to improper sanitization of user-controlled input.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GitLab | GitLab | 14.0 – < 19.0.5, 19.1 – < 19.1.3, 19.2 – < 19.2.1 | 19.0.5 |
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.
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | gitlab-runner-18.11 +5 | 18.11.4-r2 | — |
| Wolfi rolling | gitlab-runner-19.0 +5 | 19.0.3-r0 | — |
| Wolfi rolling | gitlab-runner-19.1 +5 | 19.1.2-r1 | — |
Advisories 2
- NCSC-2026-0270 Kwetsbaarheden verholpen in GitLab door GitLab Inc. NCSC-NL (Netherlands) · Jul 30, 2026
- WID-SEC-2026-2586 GitLab: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 29, 2026
References
- HackerOne Bug Bounty Report #3539833 technical-description exploit permissions-required
- https://gitlab.com/gitlab-org/gitlab/-/work_items/591274
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-2-1-released/