GitLab up to 18.11.10/19.0.7/19.1.5/19.2.3 GraphQL Query privileges management

Summaryinfo

A vulnerability categorized as critical has been discovered in GitLab up to 18.11.10/19.0.7/19.1.5/19.2.3. This issue affects some unknown processing of the component GraphQL Query Handler. Such manipulation leads to privileges management. This vulnerability is documented as CVE-2026-19650. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in GitLab up to 18.11.10/19.0.7/19.1.5/19.2.3 and classified as critical. Affected by this issue is an unknown functionality of the component GraphQL Query Handler. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is integrity, and availability. CVE summarizes:

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.11.11, 19.0 before 19.0.8, 19.1 before 19.1.6, and 19.2 before 19.2.4 that under certain conditions could have allowed an unauthenticated user to execute mutations via GET requests due to improper request validation in GraphQL multiplex query handling.

The advisory is available at gitlab.com. This vulnerability is handled as CVE-2026-19650 since 08/12/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 18.11.11, 19.0.8, 19.1.6 or 19.2.4 eliminates this vulnerability.

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Productinfo

Type

• Bug Tracking Software

Name

• GitLab

Version

• 18.11.0
• 18.11.1
• 18.11.2
• 18.11.3
• 18.11.4
• 18.11.5
• 18.11.6
• 18.11.7
• 18.11.8
• 18.11.9
• 18.11.10
• 19.0.0
• 19.0.1
• 19.0.2
• 19.0.3
• 19.0.4
• 19.0.5
• 19.0.6
• 19.0.7
• 19.1.0
• 19.1.1
• 19.1.2
• 19.1.3
• 19.1.4
• 19.1.5
• 19.2.0
• 19.2.1
• 19.2.2
• 19.2.3

License

• open-source

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CPE 2.2info

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