CVE-2025-2256 HIGH

CVE-2025-2256: Improper Validation of Specified Quantity in Input in GitLab

Vendor Gitlab
Product GitLab
Weakness CWE-1284
Published September 12, 2025
Last update September 12, 2025
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

September 12, 2025 CVE published
September 12, 2025 Record updated