GitLab 19.x Improper Auth: Dev Role Triggers CI/CD on Protected Branch
CVE-2026-15423 Published on August 12, 2026
Incorrect Authorization in GitLab
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.0 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 execute CI/CD pipelines on a protected branch without the required push permissions due to improper authorization in pipeline reference validation.
Vulnerability Analysis
CVE-2026-15423 can be exploited 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, a high impact on 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-2026-15423 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-15423
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Affected Versions
GitLab:- Version 19.0 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.