CVE-2026-47276: Nanomq

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

In nanomq versions 0.24.11 and earlier, a NULL pointer dereference in `properties_parse()` allows an authenticated attacker to crash the NanoMQ broker by sending a POST request to `/api/v4/mqtt/publish` with `user_properties` as a JSON array instead of a JSON object. The crash occurs because `strlen()` is called on a NULL `item->string` pointer when iterating over array elements. An authenticated attacker can exploit this to crash the NanoMQ broker process. This is patched in version 0.24.14.

Affected products

• Nanomq Nanomq: up to and including 0.24.11

Published 2026-07-20. Last modified 2026-07-23.