CVE-2025-12983

Memory Allocation with Excessive Size Value in GitLab

Published Nov 15, 2025 CVSS 3.1 · 3.5 Low EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

Upgrade to versions 18.3.6, 18.4.4, 18.5.2 or above.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Memory Allocation with Excessive Size Value in GitLab
First Time appeared Gitlab
Gitlab gitlab
Weaknesses CWE-789
CPEs cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Vendors & Products Gitlab
Gitlab gitlab
References
Metrics cvssV3_1

{'score': 3.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitLab
Published
Updated
Nov 17, 2025, 8:17 PM
Reserved
Nov 10, 2025, 8:34 PM
Status
Analyzed
Published
Nov 15, 2025, 9:15 AM
Modified
Oct 19, 2026, 1:10 PM