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 · NVD. Fix status from CNA. Impact type from CWE-1333.
Summary
A denial of service vulnerability was identified in GitLab CE/EE, versions 16.7.7 prior to 16.8.6, 16.9 prior to 16.9.4 and 16.10 prior to 16.10.2 which allows an attacker to spike the GitLab instance resources usage resulting in service degradation via chat integration feature.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00606 49th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed GitLab (GitLab): 16.8.6, 16.9.4, 16.10.2
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| GitLab | GitLab | 16.7.7 to before 16.8.6; 16.9 to before 16.9.4; 16.10 to before 16.10.2 | 16.8.6, 16.9.4, 16.10.2 | Patch available | CNA |
- GitLab VendorGitLab Affected 16.7.7 to before 16.8.6; 16.9 to before 16.9.4; 16.10 to before 16.10.2 Fixed in 16.8.6, 16.9.4, 16.10.2 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* | 16.7.7 to before 16.8.6 | Vulnerable | GitLab |
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* | 16.7.7 to before 16.8.6 | Vulnerable | GitLab |
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* | 16.9.0 to before 16.9.4 | Vulnerable | GitLab |
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* | 16.9.0 to before 16.9.4 | Vulnerable | GitLab |
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* | 16.10.0 to before 16.10.2 | Vulnerable | GitLab |
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* | 16.10.0 to before 16.10.2 | Vulnerable | GitLab |
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* Versions 16.7.7 to before 16.8.6 Vulnerable ·GitLab
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 16.7.7 to before 16.8.6 Vulnerable ·GitLab
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* Versions 16.9.0 to before 16.9.4 Vulnerable ·GitLab
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 16.9.0 to before 16.9.4 Vulnerable ·GitLab
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* Versions 16.10.0 to before 16.10.2 Vulnerable ·GitLab
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 16.10.0 to before 16.10.2 Vulnerable ·GitLab
Remediation
- Fix · CNA GitLab (GitLab) Fixed in 16.8.6, 16.9.4, 16.10.2
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
GitLab 16.10.2, 16.8.6, 16.9.4
3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW
Other records, highest priority first
- TI-2024-02116 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLabPriority MEDIUM 40
- TI-2023-06108 Inefficient Regular Expression Complexity in GitLabPriority LOW 30
Timeline
- 2026-10-02 Threatist record created from CVE-2023-6489
- 2026-10-03 Alias added: GHSA-997p-pqq2-w5f5
References
Exploit 1
Other 1
More Gitlab vulnerabilities
- 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
Sources
- CVE-2023-6489 · CVE Program
- CVE-2023-6489 · NVD
- FIRST EPSS
- GHSA-997p-pqq2-w5f5 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences