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CVE-2026-4398 Details

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 18.3 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user could have assigned compliance frameworks from namespaces they were not authorized to access to their own project, due to missing namespace validation on self-managed instances.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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/600360	[email protected]	Broken Link
https://hackerone.com/reports/3549150	[email protected]	Permissions Required

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-639	Authorization Bypass Through User-Controlled Key	[email protected]

Affected Products

Product	Versions
gitlab gitlab	>= 18.3.0, < 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

6 change records found show changes

Date	Action	Recorded By
Sep 28, 2026	Initial Analysis	[email protected]
Aug 28, 2026	CVE Modified	CISA-ADP
Aug 27, 2026	CVE Unrejected	[email protected]
Aug 27, 2026	CVE Modified	[email protected]
Apr 8, 2026	CVE Rejected	[email protected]
Apr 8, 2026	New CVE Received	[email protected]