CVE-2023-3424

Name: CVE-2023-3424
Creator: NVD / NIST
Published: 2023-07-13T03:15:10.347+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.76%

Last modified Jun 17, 2026

CVE-2023-3424 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.3 before 15.11.10, all versions starting from 16.0 before 16.0.6, all versions starting from 16.1 before 16.1.1. A Regular Expression Denial of Service was possible via sending crafted payloads to the preview_markdown endpoint.. EPSS estimates a 0.76% chance of exploitation in the next 30 days.

Description

An issue has been discovered in GitLab CE/EE affecting all versions starting from 10.3 before 15.11.10, all versions starting from 16.0 before 16.0.6, all versions starting from 16.1 before 16.1.1. A Regular Expression Denial of Service was possible via sending crafted payloads to the preview_markdown endpoint.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.76%

50.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Gitlab	Gitlab	>= 10.3.0, < 15.11.10
Gitlab	Gitlab	>= 16.0.0, < 16.0.6
Gitlab	Gitlab	>= 16.1.0, < 16.1.1

References

https://gitlab.com/gitlab-org/gitlab/-/issues/409802Broken Link, Vendor Advisory
https://hackerone.com/reports/1960970Third Party Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/409802Broken Link, Vendor Advisory
https://hackerone.com/reports/1960970Third Party Advisory

Timeline

Published: Jul 13, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-3424?

How severe is CVE-2023-3424?

CVE-2023-3424 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.

How do I fix CVE-2023-3424?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-3424?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST