Security Advisory

CVE-2026-2454

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-03-16 20:10:16

Last updated 2026-03-17 13:37:43

Assigner Mattermost

CVSS score 5.8

State PUBLISHED

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

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