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.
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Affected Vendors & Products
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References
History
Tue, 31 Mar 2026 03:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | nanomq: OOB Read / Crash (DoS) via Malformed MQTT Remaining Length over WebSocket | |
| Weaknesses | CWE-125 | |
| References |
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| Metrics |
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-03-30T20:11:08.586Z
Reserved: 2026-02-04T05:15:41.789Z
Link: CVE-2026-25627
Vulnrichment
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NVD
Status : Received
Published: 2026-03-30T21:17:07.750
Modified: 2026-03-30T21:17:07.750
Link: CVE-2026-25627
Redhat
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OpenCVE Enrichment
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Weaknesses