VULNERABILITY INTELLIGENCE

CVE-2026-24547

CVSS score5.3 MEDIUM

EPSS probability0.29%

CISA KEVNot currently listed

Published2026-06-26

Last modified2026-10-25

Description

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to handle incorrectly reported array lengths which allows malicious user to cause OOM errors and crash the server via sending corrupted msgpack frames within websocket messages to calls plugin. Mattermost Advisory ID: MMSA-2025-00537