CVE-2026-3109

published 2026-03-26

CVE-2026-3109: Mattermost Plugins versions <=11.4 10.11.11.0 fail to validate webhook request timestamps which allows an attacker to corrupt Zoom meeting state in Mattermost…

Priority P4 12 low 2.2 CVSS 3.1

AV N AC H PR H UI N S U C N I N A L

Mattermost Plugins versions <=11.4 10.11.11.0 fail to validate webhook request timestamps which allows an attacker to corrupt Zoom meeting state in Mattermost via replayed webhook requests. Mattermost Advisory ID: MMSA-2026-00584

Affected

2 ranges

Vendor	Product	Version range	Fixed in
mattermost	mattermost	<= 10.11.11	—
mattermost	mattermost_server	>= 10.11.0 < 10.11.12	10.11.12

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