CVE-2024-9631: Inefficient Algorithmic Complexity in GitLab

Severity: high (CVSS 7.5 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: 2025-02-05 · updated 2026-06-17
Weakness: CWE-407

Description

An issue was discovered in GitLab CE/EE affecting all versions starting from 13.6 prior to 17.2.9, starting from 17.3 prior to 17.3.5, and starting from 17.4 prior to 17.4.2, where viewing diffs of MR with conflicts can be slow.

Affected products

GitLab: from 13.6.0 before 17.2.9; from 17.3.0 before 17.3.5; from 17.4.0 before 17.4.2 — fixed in 17.2.9, 17.3.5, 17.4.2

How to fix

Upgrade to a fixed version: GitLab 17.2.9, 17.3.5, 17.4.2. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/gitlab/-/issues/480867
https://hackerone.com/reports/2650086
https://gitlab.com/gitlab-org/gitlab/-/issues/480867

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