CVE-2025-12562: gitlab DoS — Fix

Description

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.10 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have allowed an unauthenticated user to create a denial of service condition by sending crafted GraphQL queries that bypass query complexity limits.

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CVSS v3.1 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-770 CWE-770

Affected Products

Vendor	Product	Versions
gitlab	gitlab	11.10.0 — 18.4.6
gitlab	gitlab	11.10.0 — 18.4.6
gitlab	gitlab	18.5.0 — 18.5.4
gitlab	gitlab	18.5.0 — 18.5.4
gitlab	gitlab	18.6.0 — 18.6.2
gitlab	gitlab	18.6.0 — 18.6.2

References

Advisories & Patches

https://about.gitlab.com/releases/2025/12/10/patch-release-gitlab-18-6-2-released/

Other References

https://gitlab.com/gitlab-org/gitlab/-/issues/579152 https://hackerone.com/reports/3360710

Frequently Asked Questions

What is CVE-2025-12562? +

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 11.10 before 18.4.6, 18.5 before 18.5.4, and 18.6 before 18.6.2 that could have allowed an unauthenticated user to create a denial of service condition by sending crafted GraphQL queries that bypass query complexity limits. It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-12562? +

CVE-2025-12562 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-12562? +

CVE-2025-12562 affects products from gitlab, specifically: gitlab. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-12562? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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