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CVE-2026-12284

3.7 low SSVC exploitation: none Analyzed
NVD · CVE.org

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

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 3.7 · mattermostNVD modified 2026-10-13 12:04

Affected (CPE criteria) 1

  • cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*

References 1