CVE-2026-4398
Authorization Bypass Through User-Controlled Key in GitLab
- State
- Published
- Severity
- 5.4 Medium
- Published
- Aug 27, 2026
- Updated
- Aug 28, 2026
- Reserved
- Mar 18, 2026
Description
GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user could have assigned compliance frameworks from namespaces they were not authorized to access to their own project, due to missing namespace validation on self-managed instances.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N | GitLab |
Weaknesses
- CWE-639 Authorization Bypass Through User-Controlled Key
Affected Products
| Product | Versions |
|---|---|
GitLabGitLab |
|
References
- HackerOne Bug Bounty Report #3549150technical-descriptionexploitpermissions-required
- https://gitlab.com/gitlab-org/gitlab/-/work_items/600360
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-1-released/
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