EUVD-2026-17195
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
3Description
NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to version 0.24.8, NanoMQ’s MQTT-over-WebSocket transport can be crashed by sending an MQTT packet with a deliberately large Remaining Length in the fixed header while providing a much shorter actual payload. The code path copies Remaining Length bytes without verifying that the current receive buffer contains that many bytes, resulting in an out-of-bounds read (ASAN reports OOB / crash). This is remotely triggerable over the WebSocket listener. This issue has been patched in version 0.24.8.
Analysis
NanoMQ MQTT Broker versions prior to 0.24.8 can be remotely crashed via MQTT-over-WebSocket by sending a packet with a maliciously inflated Remaining Length field in the fixed header while providing a shorter actual payload, triggering an out-of-bounds read that causes denial of service. Authenticated attackers can exploit this condition over the WebSocket listener with low attack complexity. …
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