Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 17.6.5 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, an unauthenticated user could have retrieved sensitive internal server credentials due to improper filtering of internal response headers.
Affected products
gitlab: gitlab
References3
- docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-re… Release NotesVendor Advisory
- gitlab.com/gitlab-org/gitlab/-/work_items/597022 Permissions Required
- hackerone.com/reports/3657282 Permissions Required
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 0% percentile: 20 · as of 8 November 2026
- CWE
- CWE-201
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.