Vulnerability Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.5 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an unauthenticated user to cause a denial of service by making the GitLab instance unresponsive due to improper input validation in GraphQL request processing.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gitlab | Gitlab | >= 18.5.0, < 18.8.7 |
Related Weaknesses (CWE)
References
- https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-releasRelease NotesVendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/work_items/593140Broken Link
- https://hackerone.com/reports/3597342Permissions Required
FAQ
What is CVE-2026-3988?
CVE-2026-3988 is a vulnerability with a CVSS score of 7.5 (HIGH). GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.5 before 18.8.7, 18.9 before 18.9.3, and 18.10 before 18.10.1 that could have allowed an unauthenticated user to cause a d...
How severe is CVE-2026-3988?
CVE-2026-3988 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-2026-3988?
Check the references section above for vendor advisories and patch information. Affected products include: Gitlab Gitlab.