CVE-2026-21388 | Mattermost Plugins up to 2.3.1 Lifecycle Webhook Endpoint allocation of resources

A vulnerability marked as problematic has been reported in Mattermost Plugins up to 2.3.1. Affected by this vulnerability is an unknown functionality of the component Lifecycle Webhook Endpoint. This manipulation causes allocation of resources.

This vulnerability is handled as CVE-2026-21388. The attack can be initiated remotely. There is not any exploit available.

It is suggested to upgrade the affected component.