https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-06T13:18:20.472667+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2026-2454 CVE-2026-2454 — DoS in Calls plugin via malformed msgpack in websocket request. 2026-10-06T13:18:20.474428+00:00

Affected: Mattermost

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