Vulnerability Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.0 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an unauthenticated user to cause denial of service by sending specially crafted requests due to insufficient input validation.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gitlab | Gitlab | >= 9.0.0, < 18.9.7 |
Related Weaknesses (CWE)
References
- https://about.gitlab.com/releases/2026/05/13/patch-release-gitlab-18-11-3-releasRelease Notes
- https://gitlab.com/gitlab-org/gitlab/-/work_items/588201Broken Link
- https://hackerone.com/reports/3519824Permissions Required
FAQ
What is CVE-2026-1659?
CVE-2026-1659 is a vulnerability with a CVSS score of 7.5 (HIGH). GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.0 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an unauthenticated user to cause de...
How severe is CVE-2026-1659?
CVE-2026-1659 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-1659?
Check the references section above for vendor advisories and patch information. Affected products include: Gitlab Gitlab.