CVE-2026-1628

Mattermost Desktop App versions <=5.13.3 fail to attach listeners restricting navigation to external sites within the Mattermost app which allows a malicious server to expose preload script functionality to untrusted servers via having a user open an external link in their Mattermost server. Mattermost Advisory ID: MMSA-2026-00596

CVSS v3 4.6 MEDIUM

4.6^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.1 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

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_desktop:*:*:*:*:*:*:*:*

History

17 Jun 2026, 10:16

Type	Values Removed	Values Added
Summary		(es) Las versiones <=5.13.3 de la aplicación de escritorio de Mattermost no adjuntan oyentes que restringen la navegación a sitios externos dentro de la aplicación Mattermost, lo que permite a un servidor malicioso exponer la funcionalidad de script de precarga a servidores no confiables al hacer que un usuario abra un enlace externo en su servidor Mattermost. ID de Aviso de Mattermost: MMSA-2026-00596

05 Mar 2026, 16:07

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

02 Mar 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-02 14:16

Updated : 2026-06-17 10:16

NVD link : CVE-2026-1628

Mitre link : CVE-2026-1628

CVE.ORG link : CVE-2026-1628

JSON object : View

Products Affected

mattermost

mattermost_desktop

CWE

CWE-829

Inclusion of Functionality from Untrusted Control Sphere

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