Unbounded Request Body Read in MS Teams Plugin {{/changes}} Webhook Endpoint
Mattermost Plugins versions <=2.1.3.0 fail to limit the request body size on the {{/changes}} webhook endpoint which allows an authenticated attacker to cause memory exhaustion and denial of service via sending an oversized JSON payload. Mattermost Advisory ID: MMSA-2026-00611
Severity low: primary CNA CVSS 3.7 v3.1 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.
Published 2026-04-09T10:12:45.340Z. Updated 2026-04-09T11:44:35.023Z.