CVE-2025-12983
Memory Allocation with Excessive Size Value in GitLab
6.5
MEDIUM
CVSS 3.1
EPSS 0.02%
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.
How to fix CVE-2025-12983
To remediate CVE-2025-12983, upgrade the affected package to a fixed version below.
- —upgrade to 18.3.6 or later
Is CVE-2025-12983 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 16.9.0, < 18.3.6, >= 18.4.0, < 18.4.4, >= 18.5.0, < 18.5.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |