What is CVE-2023-3994?

CVE-2023-3994 is a high-severity vulnerability in Gitlab, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2023-08-02.

How severe is CVE-2023-3994?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Gitlab

CVE-2023-3994

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.

Vulnerability class: ReDoS (Regular Expression Denial of Service)

EPSS: 0.008 (53.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Gitlab — versions 9.3, 16.1, 16.2

Weakness classification (CWE)

CWE-1333 — Inefficient Regular Expression Complexity

References

cve@gitlab.com (issue-tracking, permissions-required, Broken Link)
cve@gitlab.com (Permissions Required, technical-description, permissions-required, exploit)

Frequently asked questions

What is CVE-2023-3994?: CVE-2023-3994 is a high-severity vulnerability in Gitlab, classified under Inefficient Regular Expression Complexity. CVSS score: 7.5/10. Published 2023-08-02.
How severe is CVE-2023-3994?: High severity. CVSS v3 base score is 7.5 out of 10.