CVE-2025-2256

high

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.

References

https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/

https://hackerone.com/reports/3019485

https://gitlab.com/gitlab-org/gitlab/-/issues/524633

Details

Source: Mitre, NVD

Published: 2025-09-12

Updated: 2025-09-20

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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

Severity: High

EPSS

EPSS: 0.00025