CVE-2026-1046

Mattermost Desktop App versions <=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary executables on a user’s system via the user clicking on certain items in the Help menu Mattermost Advisory ID: MMSA-2026-00577

CVSS v3 7.6 HIGH

7.6^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.3 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact LOW

Scope CHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mattermost:mattermost_desktop::::::::
	cpe:2.3:a:mattermost:mattermost_desktop::::::::

History

No history.

Information

Published : 2026-02-16 13:16

Updated : 2026-03-23 17:27

NVD link : CVE-2026-1046

Mitre link : CVE-2026-1046

CVE.ORG link : CVE-2026-1046

JSON object : View

Products Affected

mattermost

mattermost_desktop

CWE

CWE-939

Improper Authorization in Handler for Custom URL Scheme

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