Mattermost · Mattermost Plugins · CVE-2026-3116
**Name of the Vulnerable Software and Affected Versions**
Mattermost Plugins versions 10.11.11.0 through 11.4
**Description**
The software does not properly check the size of incoming requests, potentially allowing an authenticated attacker to disrupt service through the webhook endpoint. The issue affects the processing of requests sent to the `/webhooks` API endpoint. The `request size` is not validated, which can lead to a denial-of-service condition.
**Recommendations**
Update to a version of Mattermost Plugins greater than 11.4.