CVE-2026-1629

Mattermost versions 10.11.x <= 10.11.10 Fail to invalidate cached permalink preview data when a user loses channel access which allows the user to continue viewing private channel content via previously cached permalink previews until cache reset or relogin.. Mattermost Advisory ID: MMSA-2026-00580

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

History

17 Jun 2026, 10:16

Type	Values Removed	Values Added
Summary		(es) Las versiones de Mattermost 10.11.x <= 10.11.10 no invalidan los datos de vista previa de enlace permanente en caché cuando un usuario pierde el acceso al canal, lo que permite al usuario seguir viendo contenido de canal privado a través de vistas previas de enlace permanente previamente almacenadas en caché hasta el restablecimiento de la caché o el nuevo inicio de sesión. ID de aviso de Mattermost: MMSA-2026-00580

18 Mar 2026, 13:56

Type	Values Removed	Values Added
CPE		cpe:2.3:a:mattermost:mattermost_server::::::::
First Time		Mattermost Mattermost mattermost Server
References	~~() https://mattermost.com/security-updates -~~	() https://mattermost.com/security-updates - Vendor Advisory

16 Mar 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-16 21:16

Updated : 2026-06-17 10:16

NVD link : CVE-2026-1629

Mitre link : CVE-2026-1629

CVE.ORG link : CVE-2026-1629

JSON object : View

Products Affected

mattermost

mattermost_server

CWE

CWE-672

Operation on a Resource after Expiration or Release

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