CVE-2026-47276

Medium

Description

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductNanomq

PublishedJul 20, 2026

First seenJul 20, 2026

Weakness typeCWE-476NULL pointer dereference

How to fix

Sources list no fixed version or patch link for this vulnerability.

Affected products

Product	Affected versions	Fixed in
nanomq nanomq	<= 0.24.11	—

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