High severity7.5NVD Advisory· Published Sep 12, 2025· Updated Jun 17, 2026
CVE-2025-2256
CVE-2025-2256
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
6cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*range: 7.12
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*range: >=7.12.0,<18.1.6
- cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*range: >=7.12.0,<18.1.6
- (no CPE)range: from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2
- Range: from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2
Patches
Vulnerability mechanics
References
3- about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/nvdRelease NotesVendor Advisory
- gitlab.com/gitlab-org/gitlab/-/issues/524633nvdBroken Link
- hackerone.com/reports/3019485nvdPermissions Required
News mentions
1- GitLab Patch Release: 18.3.2, 18.2.6, 18.1.6GitLab Security Releases · Sep 10, 2025