CVE-2023-2199
HIGH 7.5 ALL-YEARSAn issue has been discovered in GitLab CE/EE affecting all versions starting from 12.0 before 15.10.8, all versions starting from 15.11 before 15.11.7, all versions starting from 16.0 before 16.0.2. A Regular Expression Denial of Service was possible via sending crafted payloads to the preview_markdown endpoint.
Severe if exploited (CVSS 7.5), but no confirmed exploitation. Patch on a normal cadence.
Exploitation likelihood
1.3%chance of exploitation in 30 days · 71st percentile
Impact if exploited
7.5CVSS 3.1 · HIGH · CNA
- ConfidentialityNone
- IntegrityNone
- AvailabilityHigh
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
Search for new PoCs
Search GitHub now — results may be empty or unverified.
Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Data snapshot:
Weakness (CWE)
- CWE-1333: Inefficient Regular Expression Complexity
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References and research data (JSON)
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Gitlab | Gitlab | ≥ 12.0.0 and < 15.10.8 |
| Gitlab | Gitlab | ≥ 12.0.0 and < 15.10.8 |
| Gitlab | Gitlab | ≥ 15.11.0 and < 15.11.7 |
| Gitlab | Gitlab | ≥ 15.11.0 and < 15.11.7 |
| Gitlab | Gitlab | ≥ 16.0.0 and < 16.0.2 |
| Gitlab | Gitlab | ≥ 16.0.0 and < 16.0.2 |
All CVSS metrics
- HIGH 7.5 v3.1 · CNA Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - HIGH 7.5 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
Exploit-tagged references (not proof of a PoC)
- https://gitlab.com/gitlab-org/gitlab/-/issues/408272 CVE record · GitLab · Updated 2023-06-07T00:00:00.000Z
CVE record · CVE · Updated 2024-08-02T06:12:20.665Z
CVE record · CISA-ADP · Updated 2025-01-07T16:45:38.544Z
NVD · CVE-2023-2199 · Updated 2026-06-17T05:51:58.490
Advisories
- https://hackerone.com/reports/1943819 CVE record · GitLab · Updated 2023-06-07T00:00:00.000Z
CVE record · CVE · Updated 2024-08-02T06:12:20.665Z
NVD · CVE-2023-2199 · Updated 2026-06-17T05:51:58.490 - https://gitlab.com/gitlab-org/cves/-/blob/master/2023/CVE-2023-2199.json CVE record · GitLab · Updated 2023-06-07T00:00:00.000Z
CVE record · CVE · Updated 2024-08-02T06:12:20.665Z
NVD · CVE-2023-2199 · Updated 2026-06-17T05:51:58.490 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-33712 EUVD · EUVD-2023-33712
Sources: NVD · CVE.org · All sources and attribution · EPSS