GitLab EE Auth Bypass: Dev view of External Status Check via MR API (v1619)
CVE-2026-4879 Published on August 12, 2026
Missing Authorization in GitLab
GitLab has remediated an issue in GitLab EE affecting all versions from 16.0 before 19.0.6, 19.1 before 19.1.4, and 19.2 before 19.2.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to view external status check configuration restricted to higher-privileged roles due to missing authorization on a merge request API endpoint.
Vulnerability Analysis
CVE-2026-4879 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. Public availability of a proof of concept (POC) exploit exists for CVE-2026-4879. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.
Weakness Type
What is an AuthZ Vulnerability?
The software does not perform an authorization check when an actor attempts to access a resource or perform an action.
CVE-2026-4879 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-4879
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Affected Versions
GitLab:- Version 16.0 and below 19.0.6 is affected.
- Version 19.1 and below 19.1.4 is affected.
- Version 19.2 and below 19.2.2 is affected.