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.
Fix
Patch, vendor advisory and mitigation references on NVD 1
- https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/ Release Notes, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · gitlabNVD modified 2026-10-19 17:10
Affected (CPE criteria) 2
cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*
References 3
- https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/ Release Notes, Vendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/issues/524633 Broken Link
- https://hackerone.com/reports/3019485 Permissions Required