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CVE-2026-18252 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CNA: [email protected]CVSS-B:7.3 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-1-released/	[email protected]	Release NotesVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/work_items/607342	[email protected]	Issue Tracking
https://hackerone.com/reports/3863650	[email protected]	Permissions RequiredThird Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-829	Inclusion of Functionality from Untrusted Control Sphere	[email protected]

Affected Products

Product	Versions
gitlab gitlab	>= 18.9.0, < 19.1.7 >= 19.2.0, < 19.2.5 19.3.0
CPE cpe:2.3:a:gitlab:gitlab:::::enterprise:::* cpe:2.3:a:gitlab:gitlab:19.3.0::::enterprise::: Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Aug 31, 2026	Initial Analysis	[email protected]
Aug 27, 2026	CVE Modified	CISA-ADP
Aug 26, 2026	CVE Modified	CISA-ADP
Aug 26, 2026	New CVE Received	[email protected]