CVE-2025-5101: GitLab

Medium severity, CVSS 5.0. EPSS: 0.1% chance of exploitation in the next 30 days.

An issue has been discovered in GitLab CE/EE affecting all versions before 18.1.5, 18.2 before 18.2.5, and 18.3 before 18.3.1 that under certain conditions could have allowed an authenticated attacker to distribute malicious code that appears harmless in the web interface by taking advantage of ambiguity between branches and tags during repository imports.

Affected products

• GitLab GitLab: before 18.1.5 (fixed in 18.1.5); from 18.2.0, before 18.2.5 (fixed in 18.2.5); version 18.3.0 only

Published 2025-08-27. Last modified 2026-06-17.