CVE-2026-3116 MEDIUM

CVE-2026-3116: Improper Input Validation in Zoom Plugin Webhook Handler

Vendor Mattermost
Product Mattermost
Weakness CWE-400
Published March 26, 2026
Last update March 26, 2026
View on NVD All CVEs

CVSS base score

4.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

Mattermost Plugins versions <=11.4 11.0.4 11.1.3 11.3.2 10.11.11.0 fail to validate incoming request size which allows an authenticated attacker to cause service disruption via the webhook endpoint. Mattermost Advisory ID: MMSA-2026-00589

Key dates

02Disclosure timeline

March 26, 2026 CVE published
March 26, 2026 Record updated