CVE-2026-3988

Name: CVE-2026-3988
Creator: NVD / NIST
Published: 2026-03-25T17:17:09.553+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.48%

Last modified Jun 17, 2026

CVE-2026-3988 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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 estimates a 0.48% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

0.48%

37.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-407

Affected Software

Vendor	Product	Versions
Gitlab	Gitlab	>= 18.5.0, < 18.8.7
Gitlab	Gitlab	>= 18.9.0, < 18.9.3
Gitlab	Gitlab	18.10.0

References

https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/Release Notes, Vendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/work_items/593140Broken Link
https://hackerone.com/reports/3597342Permissions Required

Timeline

Published: Mar 25, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-3988?

How severe is CVE-2026-3988?

CVE-2026-3988 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.48% probability of exploitation in the next 30 days.

How do I fix CVE-2026-3988?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-3988?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST