Vulnerability Description
An issue has been discovered in GitLab CE/EE affecting all versions from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed unauthorized users to render the GitLab instance unresponsive to legitimate users by sending multiple concurrent large SAML responses.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gitlab | Gitlab | >= 7.12.0, < 18.1.6 |
Related Weaknesses (CWE)
References
- https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-releaseRelease NotesVendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/issues/524633Broken Link
- https://hackerone.com/reports/3019485Permissions Required
FAQ
What is CVE-2025-2256?
CVE-2025-2256 is a vulnerability with a CVSS score of 7.5 (HIGH). An issue has been discovered in GitLab CE/EE affecting all versions from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed unauthorized users to render the GitLab ...
How severe is CVE-2025-2256?
CVE-2025-2256 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-2256?
Check the references section above for vendor advisories and patch information. Affected products include: Gitlab Gitlab.