Vulnerability in Gitlab
CVE-2026-3988
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.
EPSS: 0.005 (38.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Gitlab — versions 18.10.0, 18.10, 18.5
Weakness classification (CWE)
References
- cve@gitlab.com (Broken Link)
- cve@gitlab.com (Permissions Required, technical-description, permissions-required, exploit)
- cve@gitlab.com (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-3988?
- CVE-2026-3988 is a high-severity vulnerability in Gitlab, classified under Inefficient Algorithmic Complexity. CVSS score: 7.5/10. Published 2026-03-25.
- How severe is CVE-2026-3988?
- High severity. CVSS v3 base score is 7.5 out of 10.