GitLab Community Edition/Enterprise Edition up to 18.8.8/18.9.4/18.10.2 Group Member authorization

Summaryinfo

A vulnerability identified as problematic has been detected in GitLab Community Edition and Enterprise Edition up to 18.8.8/18.9.4/18.10.2. This issue affects some unknown processing of the component Group Member Handler. The manipulation leads to authorization. This vulnerability is listed as CVE-2026-4916. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in GitLab Community Edition and Enterprise Edition up to 18.8.8/18.9.4/18.10.2. This issue affects some unknown functionality of the component Group Member Handler. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. Impacted is integrity, and availability. The summary by CVE is:

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user with custom role permissions to demote or remove higher-privileged group members due to improper authorization checks on member management operations.

The weakness was presented by Theluci. The advisory is shared at hackerone.com. The identification of this vulnerability is CVE-2026-4916 since 03/26/2026. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are necessary for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 305632 (GitLab 18.2 < 18.8.9 / 18.9 < 18.9.5 / 18.10 < 18.10.3 (CVE-2026-4916)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 18.8.9, 18.9.5 or 18.10.3 eliminates this vulnerability. The upgrade is hosted for download at about.gitlab.com.

The vulnerability is also documented in the databases at Tenable (305632) and EUVD (EUVD-2026-20801). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Bug Tracking Software

Vendor

• GitLab

Name

• Community Edition
• Enterprise Edition

Version

• 18.8.0
• 18.8.1
• 18.8.2
• 18.8.3
• 18.8.4
• 18.8.5
• 18.8.6
• 18.8.7
• 18.8.8
• 18.9.0
• 18.9.1
• 18.9.2
• 18.9.3
• 18.9.4
• 18.10.0
• 18.10.1
• 18.10.2

License

• open-source

Website

• Vendor: https://gitlab.com/

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

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