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