Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.2 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain deployment configurations, could have allowed an authenticated user to poison cached page content served to other users due to improper cache key construction.
Affected products
gitlab: gitlab
References2
- docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-2-re… Release NotesVendor Advisory
- gitlab.com/gitlab-org/gitlab/-/work_items/627507 Issue Tracking
Metrics
- CVSS 3.1
-
4.6
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L - EPSS — exploit probability
- 0% percentile: 0 · as of 11 November 2026
- CWE
- CWE-349
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.