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CVE-2026-32134

5.9 · MEDIUM

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform.

Published May 19, 2026CWE-476EPSS 0.53%

Overview

CVE-2026-32134 is a medium-severity vulnerability. It was published on May 19, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In versions 0.24.10 and below, when NanoMQ handles high-concurrency reconnect traffic using a reconnect-collision payload, the broker can crash due to a NULL pointer dereference during MQTT session resumption for clean_start=0 clients. The transport's p_peer callback (tcptran_pipe_peer()) iterates cpipe->subinfol while copying session metadata from the cached old pipe to the new reconnecting pipe, without checking whether the pointer is NULL. Under a reconnect race, cpipe->subinfol can be freed and set to NULL before session restore invokes this function, resulting in a remote unauthenticated Denial-of-Service (process crash) condition. This issue has been fixed in version 0.24.11.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/nanomq/NanoNNG/commit/522ec62e29e60d1122f2aedaa6e702dcf089f7bbGitHubgithub.com/nanomq/nanomq/issues/2241GitHubgithub.com/nanomq/nanomq/releases/tag/0.24.11GitHubgithub.com/nanomq/nanomq/security/advisories/GHSA-q36f-83mh-pcv2GitHubgithub.com/nanomq/nanomq/issues/2241GitHubgithub.com/nanomq/nanomq/security/advisories/GHSA-q36f-83mh-pcv2

How CyberStrike helps

Frequently asked questions

What is CVE-2026-32134?

CVE-2026-32134 is a medium-severity vulnerability. It was published on May 19, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2026-32134?

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-32134?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-32134?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-32134 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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