Vulnerability Details CVE-2026-21888
NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. MQTT v5 Variable Byte Integer parsing out-of-bounds: get_var_integer() accepts 5-byte varints without bounds checks; reliably triggers OOB read / crash when built with ASan. This affects 0.24.6 and earlier.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 15.8%
CVSS Severity
CVSS v3 Score 7.5