CVE-2026-47276 — NULL Pointer Dereference in REST API properties_parse via Malformed user_properties
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 …
Published: 2026-07-20 · CVSS: 6.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7