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Unrated severityNVD Advisory· Published Mar 16, 2026· Updated Mar 17, 2026

DoS in Calls plugin via malformed msgpack in websocket request.

CVE-2026-2454

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

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

2
  • Mattermost/Mattermostllm-fuzzy2 versions
    <=11.3.0, <=11.2.2, <=10.11.10+ 1 more
    • (no CPE)range: <=11.3.0, <=11.2.2, <=10.11.10
    • (no CPE)range: 11.3.0

Patches

Vulnerability mechanics

References

1

News mentions

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