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CVE-2026-5308

MEDIUM CVSS: 4.9 Published: 2026-05-22 Modified: 2026-07-23

Description

Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to enforce request body size limits on plugin HTTP endpoints which allows an attacker to cause a denial of service via crafted oversized HTTP requests.. Mattermost Advisory ID: MMSA-2026-00646

Affected Platforms

Mattermost Mattermost Server

Weakness Type

CWE-400

References