Unrated severityNVD Advisory· Published Nov 15, 2025· Updated Nov 17, 2025
Memory Allocation with Excessive Size Value in GitLab
CVE-2025-12983
Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to cause a denial of service condition by submitting specially crafted markdown content with nested formatting patterns.
Affected products
2cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*range: 16.9
- (no CPE)range: <18.5.2
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
3- hackerone.com/reports/3419588mitretechnical-descriptionexploitpermissions-required
- gitlab.com/gitlab-org/gitlab/-/issues/296257mitreissue-trackingpermissions-required
- about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/mitre
News mentions
1- GitLab Patch Release: 18.5.2, 18.4.4, 18.3.6GitLab Security Releases · Nov 12, 2025