CVE-2026-1628
Medium
Description
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
SeverityMedium
CVSS4.6
Exploit probability—
Product
Mattermost Desktop
PublishedMar 2, 2026
First seenMar 2, 2026
Weakness typeCWE-829CWE-829
How to fix
Update
- mattermost mattermost_desktop5.13.4 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_desktop | v < 5.13.4 | 5.13.4 |
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