HIGHVulnerability
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Global

NVD HIGH: CVE-2026-25627 — NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to v...

Monday, March 30, 2026 at 09:17 PM UTC·Source: NIST NVD

Updated: Monday, April 6, 2026 at 12:17 AM UTC

Executive Summary

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 by

Analysis

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. CVSS Score: 6.5. Published: 2026-03-30T21:17:07.750.

Indicators of Compromise (1)

CVE (1)
CVE-2026-25627
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Mar 30, 2026. Verified by: NIST.

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