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CVE-2026-12284

Mattermost Desktop App Missing IPC Sender Validation in Calls Leave Handler

CVSS 3.1 3.8 LOWCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-12284

Published

Mattermost Desktop App versions <=6.2 6.2.2.0 fails to validate the IPC sender in the leaveCall handler which allows a malicious or compromised Mattermost server (or a user with script access to a connected server view) to disconnect an active call belonging to a different connected server via the desktopAPI.leaveCall IPC message. Mattermost Advisory ID: MMSA-2026-00699

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Affected versions, risk and source history

Exploitation and risk

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Advisory history

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23 Oct 2026 15:48:27 UTC

Mattermost Desktop App Missing IPC Sender Validation in Calls Leave Handler

cve-program · CVE-2026-12284 · Published

ChangeIntel

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Sources read 13 Nov 14:14 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current

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