CVE-2023-3979: GitLab

Medium severity, CVSS 4.3. EPSS: 0.5% chance of exploitation in the next 30 days.

An issue has been discovered in GitLab affecting all versions starting from 10.6 before 16.2.8, all versions starting from 16.3 before 16.3.5, all versions starting from 16.4 before 16.4.1. It was possible that upstream members to collaborate with you on your branch get permission to write to the merge request’s source branch.

Affected products

• GitLab GitLab: from 10.6, before 16.2.8 (fixed in 16.2.8); from 16.3.0, before 16.3.5 (fixed in 16.3.5); version 16.4.0 only

Published 2023-09-29. Last modified 2026-06-17.