GitLab up to 19.2.7/19.3.4/19.4.1 Downstream Pipeline Creation Service improper authorization

Summaryinfo

A vulnerability marked as critical has been reported in GitLab up to 19.2.7/19.3.4/19.4.1. Affected is an unknown function of the component Downstream Pipeline Creation Service. The manipulation leads to improper authorization. This vulnerability is traded as CVE-2026-16301. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in GitLab up to 19.2.7/19.3.4/19.4.1. This issue affects an unknown code of the component Downstream Pipeline Creation Service. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.7 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain conditions, could have allowed an authenticated user with Developer role to execute CI/CD pipelines on protected branches without authorization due to improper authorization checks in the downstream pipeline creation service.

The advisory is shared at gitlab.com. The identification of this vulnerability is CVE-2026-16301 since 07/20/2026. The exploitation is known to be easy. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

Upgrading to version 19.2.8, 19.3.5 or 19.4.2 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Bug Tracking Software

Name

• GitLab

Version

• 19.2.0
• 19.2.1
• 19.2.2
• 19.2.3
• 19.2.4
• 19.2.5
• 19.2.6
• 19.2.7
• 19.3.0
• 19.3.1
• 19.3.2
• 19.3.3
• 19.3.4
• 19.4.0
• 19.4.1

License

• open-source

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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