CVE-2025-13927: Allocation of Resources Without Limits or Throttling in GitLab

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-22 · updated 2026-06-17
Weakness: CWE-770

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.9 before 18.6.4, 18.7 before 18.7.2, and 18.8 before 18.8.2 that could have allowed an unauthenticated user to create a denial of service condition by sending crafted requests with malformed authentication data.

Affected products

GitLab: from 11.9.0 before 18.6.4; from 18.7.0 before 18.7.2; from 18.8.0 before 18.8.2 — fixed in 18.6.4, 18.7.2, 18.8.2

How to fix

Upgrade to a fixed version: GitLab 18.6.4, 18.7.2, 18.8.2. Check the vendor advisory for mitigations.

References

https://about.gitlab.com/releases/2026/01/21/patch-release-gitlab-18-8-2-released/
https://gitlab.com/gitlab-org/gitlab/-/issues/582737
https://hackerone.com/reports/3439683

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