CVE-2026-4643
LOW
NVD
CVSS Score
3.5
Severity
LOW
Published
May 18, 2026
Vendor
unknown
Description
Mattermost Desktop App versions <=6.1 6.0.1 5.4.13.0 fail to prevent server-rendered content from closing an underlying application view in the Mattermost Desktop App which allows a malicious server or plugin to crash the desktop client via invoking { {window.close()} } in the renderer context, leading to a denial of service condition at the client level. Mattermost Advisory ID: MMSA-2026-00633