Description
An issue has been discovered in GitLab CE/EE affecting all versions from 15.1 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed authenticated users to view administrator-only maintenance notes by accessing runner details through specific interfaces.
Affected products
gitlab: gitlab
References3
- about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-… Release NotesVendor Advisory
- gitlab.com/gitlab-org/gitlab/-/issues/551957 Broken Link
- hackerone.com/reports/3173328 Permissions Required
Metrics
- CVSS 3.1
-
4.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - EPSS — exploit probability
- 0% percentile: 27 · as of 8 November 2026
- CWE
- CWE-497
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.