Unrated severityNVD Advisory· Published Mar 11, 2026· Updated Mar 11, 2026
MQTT v5 Variable Byte Integer parsing out-of-bounds: get_var_integer()
CVE-2026-21888
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 products
2Patches
Vulnerability mechanics
References
2- github.com/nanomq/nanomq/issues/2192mitrex_refsource_MISC
- github.com/nanomq/nanomq/security/advisories/GHSA-cggc-6m7w-j7x5mitrex_refsource_CONFIRM
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