CVE-2026-18252

EUVD-2026-66428
GitLab has remediated an issue in GitLab EE affecting all versions from 18.9 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user with developer-role permissions could have executed arbitrary commands in a CI context, due to the Claude agent processing configuration from a user-controlled source.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
GitLabCNA
7.3 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 26.43%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
gitlabgitlab
18.9 ≤
𝑥
< 19.1.7
CNA
gitlabgitlab
19.2 ≤
𝑥
< 19.2.5
CNA
gitlabgitlab
19.3 ≤
𝑥
< 19.3.1
CNA
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-1-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/607342
https://hackerone.com/reports/3863650