GitLab <19.4 Improper Auth Allows MCP Token Scope Escalation
CVE-2026-92874 Published on September 23, 2026
Incorrect Authorization in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an authenticated user with an MCP-scoped token to perform actions beyond the intended scope of that token due to improper authorization checks.
Vulnerability Analysis
CVE-2026-92874 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2026-92874 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-92874
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Affected Versions
GitLab:- Version 18.3 and below 19.2.7 is affected.
- Version 19.3 and below 19.3.3 is affected.
- Version 19.4 and below 19.4.1 is affected.