# CVE-2025-59946: NanoMQ MQTT Broker (NanoMQ) is an Edge Messaging Platform. Prior to version 0.24.2, there is a classical data racing…

Source: https://junglewise.ai/threats/cve-2025-59946-nanomq-mqtt-broker-nanomq-is-an-edge-messaging-platform-prior-to  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-27  
License: CC BY 4.0 with a link back

CVE-2025-59946 · Severity: high · CVSS 7.5 · Published 2025-12-27

NanoMQ MQTT Broker (NanoMQ) is an Edge Messaging Platform. Prior to version 0.24.2, there is a classical data racing issue about sub info list which could result in heap use after free crash. This issue has been patched in version 0.24.2.

Technologies: [EMQX Nanomq](https://junglewise.ai/threats/technologies/emqx-nanomq). Vendors: [EMQX](https://junglewise.ai/threats/vendors/emqx).

## Quick answers

**Is CVE-2025-59946 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-59946 being exploited in the wild.

**How severe is CVE-2025-59946?** High severity, with a CVSS score of 7.5, published 27 December 2025.

**Which products and versions are affected?** EMQX Nanomq. The advisory does not name versions.

**Is there a fix for CVE-2025-59946?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-59946?** Check whether you run EMQX Nanomq. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- EMQX Nanomq

## Related threats

- [NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Versions prior to 0.24.11 have a remotely…](https://junglewise.ai/threats/cve-2026-32135-nanomq-mqtt-broker-nanomq-is-an-all-around-edge-messaging)
- [NanoMQ is a messaging broker/bus for IoT Edge & SDV. Versions prior to 0.24.4 have a buffer overflow case while the…](https://junglewise.ai/threats/cve-2025-59947-nanomq-is-a-messaging-broker-bus-for-iot-edge-sdv-versions-prior)