CVE-2025-12983 — Memory Allocation with Excessive Size Value in Gitlab

CWE-789 — Memory Allocation with Excessive Size Value5 documents5 sources
Severity
6.5MEDIUMNVD
EPSS
0.0%
top 94.61%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
GitlabDebian GitlabGitlab CE
Timeline
PublishedNov 15

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 2.8 | Impact: 3.6

Affected Packages5 packages

▶CVEListV5gitlab/gitlab16.9 — 18.3.6+2
▶NVDgitlab/gitlab16.9.0 — 18.3.6+2
▶debiandebian/gitlab
▶gitlabgitlab/gitlab

🔴Vulnerability Details

2
OSV
CVE-2025-12983: GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16↗2025-11-15
▶
GHSA
GHSA-9mv9-gw4x-7xw4: GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16↗2025-11-15
▶

📋Vendor Advisories

2
GitLab
CVE-2025-12983: 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 h↗2025-11-15
▶
Debian
CVE-2025-12983: gitlab - GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 ...↗2025
▶