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CVE-2026-21888

HIGH CVSS: 7.5 Published: 2026-03-11 Modified: 2026-06-17

Description

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.

Affected Platforms

Emqx Nanomq

Weakness Type

CWE-125

References