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CVE-2026-25627

nanomq: OOB Read / Crash (DoS) via Malformed MQTT Remaining Length over WebSocket PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
nanomq / nanomqaffected < 0.24.8

CWE

CWE-125

References

ADP enrichment

CISA-ADP

No English description supplied.