CVE-2026-4643 — Calling window.close() from server-side content causes crash in the Mattermost Desktop App
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 allo…
Published: 2026-05-18 · CVSS: 3.5 · CVSS 3.1
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
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7