CVE-2026-3116

—

CVSS 3.1

4.9 medium

EPSS

<1%p27

Published

Mar 26, 2026 (Mar 26, 2026)

Modified

Jun 17, 2026

Description

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

Vendors: mattermost
Products: mattermost server
Weakness: CWE-400
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (0.3%)

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