CVE-2023-5226: GitLab

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

An issue has been discovered in GitLab affecting all versions before 16.4.3, all versions starting from 16.5 before 16.5.3, all versions starting from 16.6 before 16.6.1. Under certain circumstances, a malicious actor bypass prohibited branch checks using a specially crafted branch name to manipulate repository content in the UI.

Affected products

• GitLab GitLab: 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.