nanomq NanoMQ MQTT Broker up to 0.24.13 prov_data type confusion

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in nanomq NanoMQ MQTT Broker up to 0.24.13. The affected element is an unknown function. Executing a manipulation of the argument prov_data can lead to type confusion. The identification of this vulnerability is CVE-2026-44640. The attack can only be executed locally. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in nanomq NanoMQ MQTT Broker up to 0.24.13 and classified as problematic. This vulnerability affects an unknown part. The manipulation of the argument prov_data with an unknown input leads to a type confusion vulnerability. The CWE definition for the vulnerability is CWE-843. The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to 0.24.14, aio->prov_data is stored as nni_quic_conn* during dialing, but read as ex_quic_conn* during dialer close. This type confusion causes invalid object interpretation and leads to close-path hang/crash behavior. This vulnerability is fixed in 0.24.14.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-44640 since 05/07/2026. The exploitation appears to be difficult. The attack needs to be approached locally. There are known technical details, but no exploit is available.

Upgrading to version 0.24.14 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-33428). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.5
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

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

Exploitinginfo

Class: Type confusion
CWE: CWE-843
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: NanoMQ MQTT Broker 0.24.14

Timelineinfo

05/07/2026 CVE reserved
05/30/2026 +23 days Advisory disclosed
05/30/2026 +0 days VulDB entry created
05/30/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-9fgw-v323-jmjj
Status: Confirmed

CVE: CVE-2026-44640 (🔒)
GCVE (CVE): GCVE-0-2026-44640
GCVE (VulDB): GCVE-100-367384
EUVD: 🔒

Entryinfo

Created: 05/30/2026 07:33
Updated: 05/30/2026 08:28
Changes: 05/30/2026 07:33 (65), 05/30/2026 08:28 (1)
Complete: 🔍
Cache ID: 216::103

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