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TI-2023-06116 Aliases CVE-2023-6688GHSA-h453-7rrx-q6j5

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 CE/EE affecting all versions starting from 16.11 prior to 16.11.2. A problem with the processing logic for Google Chat Messages integration may lead to a regular expression DoS attack on the server.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00752 55th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed GitLab (GitLab): 16.11.2

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
GitLabGitLab16.11 to before 16.11.216.11.2Patch availableCNA
  • GitLab VendorGitLab Affected 16.11 to before 16.11.2 Fixed in 16.11.2 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*16.11.0 to before 16.11.2VulnerableGitLab
cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*16.11.0 to before 16.11.2VulnerableGitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* Versions 16.11.0 to before 16.11.2 Vulnerable ·GitLab
  • cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 16.11.0 to before 16.11.2 Vulnerable ·GitLab

Remediation

  • Fix · CNA GitLab (GitLab) Fixed in 16.11.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-6688
  2. 2026-10-03 Alias added: GHSA-h453-7rrx-q6j5

References

Exploit 1

Other 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