CVE-2026-3988

EUVD-2026-15937
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 44%
Affected Products (NVD)
VendorProductVersion
gitlabgitlab
18.5.0 ≤
𝑥
< 18.8.7
gitlabgitlab
18.5.0 ≤
𝑥
< 18.8.7
gitlabgitlab
18.9.0 ≤
𝑥
< 18.9.3
gitlabgitlab
18.9.0 ≤
𝑥
< 18.9.3
gitlabgitlab
18.10.0
gitlabgitlab
18.10.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
gitlab
sid
17.6.5-19
fixed
Common Weakness Enumeration
References
https://about.gitlab.com/releases/2026/03/25/patch-release-gitlab-18-10-1-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/593140
https://hackerone.com/reports/3597342