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OpenAdvisories
Medium · 4.3 CVE-2025-62723 EUVD-2025-35890

FlashMQ does not release memory of queued QoS messages

Published Oct 24, 2025 · Updated Oct 24, 2025 · Assigned by GitHub_M

Description

FlashMQ is a MQTT broker/server, designed for multi-CPU environments. Prior to version 1.23.2, any authenticated user can create sessions and have them collect QoS messages. When not sent to a client, these are then not released upon (eventual) session expiration. Version 1.23.2 fixes the issue.

Affected products

VendorProductAffectedFixed
halfgaar FlashMQ < 1.23.2 —

References