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.
{
"cwe_ids": [
"CWE-476"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47276.json"
}