CVE-2026-4398CWE-639

CVE-2026-4398

Medium · published April 9, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
20.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00294 · 20.9th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-04-09T03:16Z
Affected products (3)
ProductVersionsFixed in
gitlab/gitlab≥ 18.3.0, < 19.1.719.1.7
gitlab/gitlab≥ 19.2.0, < 19.2.519.2.5
gitlab/gitlaball versions—
References (3)
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-1-released/ · [email protected]https://gitlab.com/gitlab-org/gitlab/-/work_items/600360 · [email protected]https://hackerone.com/reports/3549150 · [email protected]
EPSS history
Timeline
  • 27 AUG 17:53Z
    Authorization Bypass Through User-Controlled Key in GitLab
    cvelistv5