CVE-2026-8683
Medium · 6.5CVSS
6.5
EPSS
0.4%
Published
Jun 15, 2026
CISA due date
—
The record
Mattermost Desktop App versions <=6.1 5.5.13.0 fail to account for attempting to open extremely long URLs in the Mattermost Desktop App which allows a malicious server owner to crash the application via including a script to call window.open on a very large URL. Mattermost Advisory ID: MMSA-2026-00652
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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