Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.0 before 18.3.5, 18.4 before 18.4.3, and 18.5 before 18.5.1 that could have allowed an unauthenticated attacker to cause a denial of service condition by sending GraphQL requests with crafted JSON payloads.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| GitLab | GitLab | 11.0 – < 18.3.5, 18.4 – < 18.4.3, 18.5 – < 18.5.1 | 18.3.5 |
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.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | gitlab | No fix yet | — |
Advisories 2
- WID-SEC-2025-2376 GitLab: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 28, 2025
- NCSC-2025-0342 Kwetsbaarheden verholpen in GitLab Enterprise en Community Edition NCSC-NL (Netherlands) · Oct 27, 2025
References
- https://about.gitlab.com/releases/2025/10/22/patch-release-gitlab-18-5-1-released/
- GitLab Issue #574858 issue-tracking permissions-required
- HackerOne Bug Bounty Report #3367019 technical-description exploit permissions-required