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TI-2023-06156 Aliases CVE-2023-6736GHSA-4fr5-6ccq-75w2

Inefficient Regular Expression Complexity in GitLab

Priority LOW 30CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-1333.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00643 51st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed GitLab (GitLab): 16.7.6, 16.8.3, 16.9.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
GitLabGitLab11.3 to before 16.7.6; 16.8 to before 16.8.3; 16.9 to before 16.9.116.7.6, 16.8.3, 16.9.1Patch availableCNA
  • GitLab VendorGitLab Affected 11.3 to before 16.7.6; 16.8 to before 16.8.3; 16.9 to before 16.9.1 Fixed in 16.7.6, 16.8.3, 16.9.1 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*11.3.0 to before 16.7.6; 16.8.0 to before 16.8.3VulnerableGitLab
cpe:2.3:a:gitlab:gitlab:16.9.0:*:*:*:enterprise:*:*:*16.9.0VulnerableGitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 11.3.0 to before 16.7.6; 16.8.0 to before 16.8.3 Vulnerable ·GitLab
  • cpe:2.3:a:gitlab:gitlab:16.9.0:*:*:*:enterprise:*:*:* Versions 16.9.0 Vulnerable ·GitLab

Remediation

  • Fix · CNA GitLab (GitLab) Fixed in 16.7.6, 16.8.3, 16.9.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-6736
  2. 2026-10-03 Alias added: GHSA-4fr5-6ccq-75w2
  3. 2026-10-21 EPSS moved to the 50th–90th percentile

References

Exploit 1

Advisory 1

  • TI-2026-71508 Integer overflow in GitLab allows code execution on the server KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-58817 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in GitLab KEVCVSS 3.1CRITICAL 10.0
  • TI-2023-06425 Weak Password Recovery Mechanism for Forgotten Password in GitLab KEVCVSS 3.1CRITICAL 10.0
  • TI-2021-05191 Code injection in GitLab KEVCVSS 3.1CRITICAL 10.0
  • TI-2021-05161 Server-side request forgery in GitLab KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-02763 Injection in GitLab CVSS 3.1CRITICAL 9.9
See all 1506 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences