CVE-2023-3994

Inefficient Regular Expression Complexity in GitLab

Published Aug 2, 2023 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
An issue has been discovered in GitLab CE/EE affecting all versions starting from 9.3 before 16.0.8, all versions starting from 16.1 before 16.1.3, all versions starting from 16.2 before 16.2.2. A Regular Expression Denial of Service was possible via sending crafted payloads which use ProjectReferenceFilter to the preview_markdown endpoint.

Remediation

Vendor Solution

Upgrade to versions 16.2.2, 16.1.3, 16.0.8 or above.

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2023-44617 An issue has been discovered in GitLab CE/EE affecting all versions starting from 9.3 before 16.0.8, all versions starting from 16.1 before 16.1.3, all versions starting from 16.2 before 16.2.2. A Regular Expression Denial of Service was possible via sending crafted payloads which use ProjectReferenceFilter to the preview_markdown endpoint.
History
Type Values Removed Values Added
Weaknesses CWE-400
Type Values Removed Values Added
Title Uncontrolled Resource Consumption in GitLab Inefficient Regular Expression Complexity in GitLab
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
CPEs cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*
Weaknesses

Sources

Status
PUBLISHED
Assigner
GitLab
Published
Updated
Apr 27, 2026, 4:06 AM
Reserved
Jul 28, 2023, 9:01 AM
Status
Modified
Published
Aug 2, 2023, 1:15 AM
Modified
Jun 17, 2026, 6:15 AM
Severity
Moderate
Public date
Aug 2, 2023, 12:00 AM