Inefficient Regular Expression Complexity in GitLab
Priority MEDIUM 41CWE-1333Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- 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 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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00905 60th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix Fixed GitLab (GitLab): 15.11.10, 16.0.6, 16.1.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- 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 | 10.3 to before 15.11.10; 16.0 to before 16.0.6; 16.1 to before 16.1.1 | 15.11.10, 16.0.6, 16.1.1 | Patch available | CNA |
- GitLab VendorGitLab Affected 10.3 to before 15.11.10; 16.0 to before 16.0.6; 16.1 to before 16.1.1 Fixed in 15.11.10, 16.0.6, 16.1.1 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* | 10.3.0 to before 15.11.10 | Vulnerable | GitLab |
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* | 10.3.0 to before 15.11.10 | Vulnerable | GitLab |
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* | 16.0.0 to before 16.0.6 | Vulnerable | GitLab |
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* | 16.0.0 to before 16.0.6 | Vulnerable | GitLab |
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* | 16.1.0 to before 16.1.1 | Vulnerable | GitLab |
| cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* | 16.1.0 to before 16.1.1 | Vulnerable | GitLab |
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* Versions 10.3.0 to before 15.11.10 Vulnerable ·GitLab
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 10.3.0 to before 15.11.10 Vulnerable ·GitLab
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* Versions 16.0.0 to before 16.0.6 Vulnerable ·GitLab
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 16.0.0 to before 16.0.6 Vulnerable ·GitLab
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:* Versions 16.1.0 to before 16.1.1 Vulnerable ·GitLab
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:* Versions 16.1.0 to before 16.1.1 Vulnerable ·GitLab
Remediation
- Fix · CNA GitLab (GitLab) Fixed in 15.11.10, 16.0.6, 16.1.1
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
GitLab 15.11.10, 16.0.6, 16.1.1
7 records Highest priority Priority MEDIUM 7 MEDIUM
Other records, highest priority first
- TI-2023-03218 Incorrect Authorization in GitLabPriority MEDIUM 62
- TI-2023-02054 Authorization Bypass Through User-Controlled Key in GitLabPriority MEDIUM 62
- TI-2023-02449 Insertion of Sensitive Information Into Sent Data in GitLabPriority MEDIUM 58
Timeline
- 2026-10-02 Threatist record created from CVE-2023-3424
- 2026-10-03 Alias added: GHSA-73w2-5f6g-jx42
References
Exploit 1
Advisory 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-2023-3424 · CVE Program
- CVE-2023-3424 · NVD
- FIRST EPSS
- GHSA-73w2-5f6g-jx42 · 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