CVE-2025-2256

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 v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:gitlab:gitlab:::::community:::*
	cpe:2.3:a:gitlab:gitlab:::::enterprise:::*
	cpe:2.3:a:gitlab:gitlab:::::community:::*
	cpe:2.3:a:gitlab:gitlab:::::enterprise:::*
	cpe:2.3:a:gitlab:gitlab:::::community:::*
	cpe:2.3:a:gitlab:gitlab:::::enterprise:::*

History

20 Sep 2025, 02:56

Type	Values Removed	Values Added
CPE		cpe:2.3:a:gitlab:gitlab:::::community:::* cpe:2.3:a:gitlab:gitlab:::::enterprise:::*
First Time		Gitlab gitlab Gitlab
References	~~() https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/ -~~	() https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/ - Release Notes, Vendor Advisory
References	~~() https://gitlab.com/gitlab-org/gitlab/-/issues/524633 -~~	() https://gitlab.com/gitlab-org/gitlab/-/issues/524633 - Broken Link
References	~~() https://hackerone.com/reports/3019485 -~~	() https://hackerone.com/reports/3019485 - Permissions Required

12 Sep 2025, 06:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-09-12 06:15

Updated : 2025-09-20 02:56

NVD link : CVE-2025-2256

Mitre link : CVE-2025-2256

CVE.ORG link : CVE-2025-2256

JSON object : View

Products Affected

gitlab

gitlab

CWE

CWE-1284

Improper Validation of Specified Quantity in Input

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