CVE-2024-6324: Inefficient Algorithmic Complexity in GitLab

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-01-09 · updated 2026-06-17
Weakness: CWE-407

Description

An issue was discovered in GitLab CE/EE affecting all versions starting from 15.7 prior to 17.5.5, starting from 17.6 prior to 17.6.3, and starting from 17.7 prior to 17.7.1. It was possible to trigger a DoS by creating cyclic references between epics.

Affected products

GitLab: from 15.7.0 before 17.5.5; from 17.6.0 before 17.6.3; from 17.7.0 before 17.7.1 — fixed in 17.5.5, 17.6.3, 17.7.1

How to fix

Upgrade to a fixed version: GitLab 17.5.5, 17.6.3, 17.7.1. Check the vendor advisory for mitigations.

References

https://about.gitlab.com/releases/2025/01/08/patch-release-gitlab-17-7-1-released/#cyclic-reference-of-epics-leads-resource-exhaustion
https://gitlab.com/gitlab-org/gitlab/-/issues/468914
https://hackerone.com/reports/2553716

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