CVE-2026-18252CWE-829

CVE-2026-18252

High · published August 26, 2026

CVSS v3.1
7.3
EPSS
0%
Percentile
35.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00418 · 35.1th percentile
Weakness
CWE-829 · Inclusion of Functionality from Untrusted Control Sphere
Published
2026-08-26T18:17Z
Affected products (3)
ProductVersionsFixed in
gitlab/gitlab≥ 18.9.0, < 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/607342 · [email protected]https://hackerone.com/reports/3863650 · [email protected]
EPSS history
Timeline
  • 28 AUG 06:32Z
    EPSS moved — → 0%
    epss
  • 26 AUG 13:36Z
    Inclusion of Functionality from Untrusted Control Sphere in GitLab
    cvelistv5