CVE-2023-6736

MEDIUM 6.5

Inefficient Regular Expression Complexity in GitLab

CVSS Score

6.5

EPSS Score

0.1%

EPSS Percentile

19th

An issue has been discovered in GitLab EE affecting all versions starting from 11.3 before 16.7.6, all versions starting from 16.8 before 16.8.3, all versions starting from 16.9 before 16.9.1. It was possible for an attacker to cause a client-side denial of service using malicious crafted content in the CODEOWNERS file.

CWE	CWE-1333
Vendor	gitlab
Product	gitlab
Ecosystems	DevTools
Industries	Technology
Published	Feb 7, 2024
Last Updated	Apr 24, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

GitLab / GitLab

11.3 < 16.7.6 16.8 < 16.8.3 16.9 < 16.9.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

gitlab.com: https://gitlab.com/gitlab-org/gitlab/-/issues/435036 hackerone.com: https://hackerone.com/reports/2269023

Credits

Thanks [joaxcar](https://hackerone.com/joaxcar) for reporting this vulnerability through our HackerOne bug bounty program