CVE-2026-32135: Emqx Nanomq

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Versions prior to 0.24.11 have a remotely triggerable heap buffer overflow in the `uri_param_parse` function of NanoMQ's REST API. The vulnerability occurs due to an off-by-one error when allocating memory for query parameter keys and values, allowing an attacker to write a null byte beyond the allocated buffer. This can be triggered via a crafted HTTP request. Version 0.24.11 patches the issue.

Affected products

• Emqx Nanomq: before 0.24.11 (fixed in 0.24.11)

Published 2026-04-20. Last modified 2026-06-17.