CyberRota Analysis
This is a low severity vulnerability with a CVSS score of 3.7. Exploitation may require the attacker to be authenticated. It may lead to a denial-of-service condition.
CVE
CVE-2026-21388
Severity
LOW
CVSS
3.7
EPSS
0.31%
Original NVD 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
Related CVEs
Other vulnerabilities affecting the same vendor(s)