Description
GitLab has remediated an issue in GitLab EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that, in customizable analytics dashboards, could have allowed an authenticated user to execute arbitrary JavaScript in the context of other users' browsers due to improper input sanitization.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GitLab | GitLab | 18.2 – < 18.8.9, 18.9 – < 18.9.5, 18.10 – < 18.10.3 | 18.8.9 |
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 1
- WID-SEC-2026-1010 GitLab CE/EE: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 7, 2026
References
- https://gitlab.com/gitlab-org/gitlab/-/work_items/593853
- HackerOne Bug Bounty Report #3600345 technical-description exploit permissions-required
- https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/