NULL pointer dereference in NanoMQ - CVE-2026-47275
Published: June 29, 2026
Vulnerability identifier: #VU135789
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-47275
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: NanoMQ
Affected software:
NanoMQ
NanoMQ
Detailed vulnerability description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in nni_mqttv5_msg_decode_connect() when processing a crafted MQTTv5 CONNECT packet from a broker. A remote user can send a specially crafted packet to cause a denial of service.
The issue affects the NanoMQ MQTTv5 client receive path, including nanomq_cli and bridge mode, and user interaction is required because the client must connect to a malicious broker.
How to mitigate CVE-2026-47275
Install security update from vendor's website.