CVE-2023-4658: GitLab

Low severity, CVSS 3.1. EPSS: 0.5% chance of exploitation in the next 30 days.

An issue has been discovered in GitLab EE affecting all versions starting from 8.13 before 16.4.3, all versions starting from 16.5 before 16.5.3, all versions starting from 16.6 before 16.6.1. It was possible for an attacker to abuse the `Allowed to merge` permission as a guest user, when granted the permission through a group.

Affected products

• GitLab GitLab: from 8.13.0, before 16.4.3 (fixed in 16.4.3); from 16.5.0, before 16.5.3 (fixed in 16.5.3); version 16.6.0 only

Published 2023-12-01. Last modified 2026-06-17.