CVE-2025-5996: 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: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-06-12 · updated 2026-06-17
Weakness: CWE-770

Description

An issue has been discovered in GitLab CE/EE affecting all versions from 2.1.0 before 17.10.8, 17.11 before 17.11.4, and 18.0 before 18.0.2. A lack of input validation in HTTP responses could allow an authenticated user to cause denial of service.

Affected products

GitLab: from 2.1.0 before 17.10.8; from 17.11.0 before 17.11.4; from 18.0.0 before 18.0.2 — fixed in 17.10.8, 17.11.4, 18.0.2

How to fix

Upgrade to a fixed version: GitLab 17.10.8, 17.11.4, 18.0.2. Check the vendor advisory for mitigations.

References

https://gitlab.com/gitlab-org/gitlab/-/issues/476671
https://gitlab.com/gitlab-org/gitlab/-/issues/479167
https://gitlab.com/gitlab-org/gitlab/-/issues/483111
https://gitlab.com/gitlab-org/gitlab/-/issues/483150
https://gitlab.com/gitlab-org/gitlab/-/issues/498649

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