CVE-2026-1046
High
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
SeverityHigh
CVSS7.6
Exploit probability—
Product
Mattermost Desktop
PublishedFeb 16, 2026
First seenFeb 16, 2026
Weakness typeCWE-939CWE-939
How to fix
Update
- mattermost mattermost_desktop5.13.3, 6.0.3 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_desktop | 5.13.0 ≤ v < 5.13.3, 6.0.0 ≤ v < 6.0.3 | 5.13.3, 6.0.3 |
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