Description

Mattermost Plugins versions <=2.3.1 fail to limit the request body size on the {{/lifecycle}} 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-2026-00610

INFO

Published Date :

2026-04-09T10:09:23.899Z

Last Modified :

2026-04-09T11:44:54.614Z

Source :

Mattermost
AFFECTED PRODUCTS

The following products are affected by CVE-2026-21388 vulnerability.

Vendors Products
Mattermost
  • Mattermost
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-21388.

URL Resource
https://mattermost.com/security-updates cve-icon cve-icon
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