NULL Pointer Dereference Affecting nanomq/NanoNNG package, versions [0,0.25.6)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about NULL Pointer Dereference vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-UNMANAGED-NANOMQNANONNG-18189936
- published22 Jul 2026
- disclosed20 Jul 2026
- creditUnknown
Introduced: 20 Jul 2026
CVE-2026-47275 (opens in a new tab)How to fix?
Upgrade nanomq/NanoNNG to version 0.25.6 or higher.
Overview
Affected versions of this package are vulnerable to NULL Pointer Dereference in the nni_mqttv5_msg_decode_connect function. An attacker can cause the client process to crash by sending a specially crafted MQTT CONNECT packet from a malicious broker, which triggers a NULL pointer dereference and results in a segmentation fault. This can lead to persistent denial of service if auto-reconnect is enabled, causing an infinite crash loop.