CVE-2023-3994

HIGH

GitLab 9.3-16.0.7, 16.1-16.1.2, 16.2-16.2.1 - Regular Expression Denial of Service via ProjectReferenceFilter

Title source: llm
STIX 2.1

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.

References (2)

Core 2
Core References
Broken Link issue-tracking permissions-required
https://gitlab.com/gitlab-org/gitlab/-/issues/416225
Permissions Required technical-description exploit permissions-required
https://hackerone.com/reports/1963255

Scores

CVSS v3 7.5
EPSS 0.0082
EPSS Percentile 52.3%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-1333
Status published
Products (4)
GitLab/GitLab 16.1 - 16.1.3
GitLab/GitLab 16.2 - 16.2.2
gitlab/gitlab 9.3 - 16.0.8 (2 CPE variants)
GitLab/GitLab 9.3 - 16.0.8
Published Aug 02, 2023
Tracked Since Feb 18, 2026