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OpenAdvisories
High · 7.5 CVE-2026-8686 EUVD-2026-30581

DoS from MQTT v5.0 Deserialization Fault in core MQTT

Published May 15, 2026 · Updated May 15, 2026 · Assigned by AMZN

Description

Missing bounds validation in the MQTT v5.0 property parser in coreMQTT before 5.0.1 allows an MQTT broker to cause a denial of service by sending a crafted packet.

To remediate this issue, users should upgrade to v5.0.1.

Affected products

VendorProductAffectedFixed
FreeRTOS coreMQTT 5.0.0 —

References