CVE-2026-6346

Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to sanitize sensitive configuration fields before including them in support packet generation, which allows a Mattermost System Admin or any party with access to a support packet to obtain sensitive credentials in plaintext via downloading a support packet from the System Console.. Mattermost Advisory ID: MMSA-2026-00607

CVSS v3 8.7 HIGH

8.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.3 / Impact : 5.8

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://mattermost.com/security-updates	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::

History

14 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) Las versiones de Mattermost 11.5.x menor o igual que 11.5.1, 10.11.x menor o igual que 10.11.13, 11.4.x menor o igual que 11.4.3 no logran sanear campos de configuración sensibles antes de incluirlos en la generación de paquetes de soporte, lo que permite a un administrador del sistema de Mattermost o a cualquier parte con acceso a un paquete de soporte obtener credenciales sensibles en texto plano mediante la descarga de un paquete de soporte desde la Consola del Sistema. ID de aviso de Mattermost: MMSA-2026-00607

Information

Published : 2026-05-18 09:16

Updated : 2026-10-14 20:10

NVD link : CVE-2026-6346

Mitre link : CVE-2026-6346

CVE.ORG link : CVE-2026-6346

JSON object : View

Products Affected

mattermost

mattermost_server

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

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