CVE-2025-12576: Allocation of Resources Without Limits or Throttling in GitLab

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-11 · updated 2026-06-17
Weakness: CWE-770

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 9.3 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that under certain conditions could have allowed an authenticated user to cause a denial of service due to improper handling of webhook response data.

Affected products

GitLab: from 9.3.0 before 18.7.6; from 18.8.0 before 18.8.6; from 18.9.0 before 18.9.2 — fixed in 18.7.6, 18.8.6, 18.9.2

How to fix

Upgrade to a fixed version: GitLab 18.7.6, 18.8.6, 18.9.2. Check the vendor advisory for mitigations.

References

https://about.gitlab.com/releases/2026/03/11/patch-release-gitlab-18-9-2-released/
https://gitlab.com/gitlab-org/gitlab/-/work_items/579170
https://hackerone.com/reports/3395198

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