CVE-2026-3988
Inefficient Algorithmic Complexity in GitLab
7.5
HIGH
CVSS 3.1
EPSS 0.23%
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.
How to fix CVE-2026-3988
To remediate CVE-2026-3988, upgrade the affected package to a fixed version below.
- —upgrade to 18.8.7 or later
Is CVE-2026-3988 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 18.5.0, < 18.8.7, >= 18.9.0, < 18.9.3, >= 18.10.0, < 18.10.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |