# CVE-2026-3988

## Summary

- **CVE ID:** CVE-2026-3988
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-407
- **Published:** Mar 25, 2026
- **Last Modified:** Mar 25, 2026

## 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.

## Affected Products

- GitLab — GitLab (18.5)
- GitLab — GitLab (18.9)
- GitLab — GitLab (18.10)

## References

- [CNA](https://gitlab.com/gitlab-org/gitlab/-/work_items/593140)
- [CNA](https://hackerone.com/reports/3597342)
- [CNA](https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.48%
- **EPSS Percentile:** 39.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._