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

19 Oct 2026, 17:10

Type	Values Removed	Values Added
Summary		(es) Se ha descubierto un problema en GitLab CE/EE que afecta a todas las versiones desde la 7.12 anteriores a la 18.1.6, la 18.2 anteriores a la 18.2.6, y la 18.3 anteriores a la 18.3.2 que podría haber permitido a usuarios no autorizados dejar la instancia de GitLab sin respuesta para los usuarios legítimos al enviar múltiples respuestas SAML concurrentes de gran tamaño.

Information

Published : 2025-09-12 06:15

Updated : 2026-10-19 17:10

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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