Missing Authorization in GitLab Enterprise Edition - CVE-2026-6821
Published: August 13, 2026
Vulnerability identifier: #VU142369
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-6821
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose limited merge request information from a private project.
The vulnerability exists due to improper access control in merge requests API when handling requests to a merge requests endpoint. A remote user can send a crafted request to disclose limited merge request information from a private project.
The issue can bypass IP-based access restrictions.
Affected software
GitLab Enterprise Edition
How to mitigate CVE-2026-6821
Install security update from vendor's website.
GitLab Enterprise Edition - addressed in versions 19.0.6, 19.1.4, 19.2.2