CVE-2026-1046

MediumCVSS 6.5/10Last modified Oct 15, 2026

Description

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

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-939

Affected software

Vendor	Product	Versions
Mattermost	Mattermost	<= 6.2.0; <= 5.2.13

References

https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Feb 16, 2026
Last modified: Oct 15, 2026
NVD status: Analyzed

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