NanoMQ up to 0.24.11 properties_parse user_properties null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k2.42

Summaryinfo

A vulnerability was found in NanoMQ up to 0.24.11. It has been rated as critical. The impacted element is an unknown function of the component properties_parse. This manipulation of the argument user_properties causes null pointer dereference. This vulnerability is registered as CVE-2026-47276. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in NanoMQ up to 0.24.11 and classified as critical. Affected by this vulnerability is an unknown function of the component properties_parse. The manipulation of the argument user_properties with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-47276 since 05/19/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 0.24.14 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-46025). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: NanoMQ 0.24.14

Timelineinfo

05/19/2026 CVE reserved
07/20/2026 +62 days Advisory disclosed
07/20/2026 +0 days VulDB entry created
07/20/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-47276 (🔒)
GCVE (CVE): GCVE-0-2026-47276
GCVE (VulDB): GCVE-100-380695
EUVD: 🔒

Entryinfo

Created: 07/20/2026 19:55
Updated: 07/20/2026 21:58
Changes: 07/20/2026 19:55 (53), 07/20/2026 21:58 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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