CVE-2026-32696: NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform

Q: How do I fix CVE-2026-32696?

nanomq: upgrade to 0.24.7. Exact commands for each OS are on this page.

Q: Is CVE-2026-32696 being exploited?

CVE-2026-32696 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-32696 affect?

CVE-2026-32696 affects nanomq. Severity is low (CVSS 3.1). NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In NanoMQ version 0.24.6, after enabling auth.http_auth (HTTP authentication), when a client connects to the broker using MQTT CONNECT without providing username/password

Q: How urgent is CVE-2026-32696?

Priority 25/100. Public exploit reference

Routine

LOW 3.1UPGRADE

CVE-2026-32696 is a low-severity flaw (CVSS 3.1) affecting nanomq. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In NanoMQ version 0.24.6, after enabling auth.http_auth (HTTP authentication), when a client connects to the broker using MQTT CONNECT without providing username/password, and the configuration params uses the placeholders %u / %P (e.g., username="%u", password="%P"), the HTTP request construction phase enters auth_http.c:set_data(). This results in calling strlen() on a NULL p

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	3.1 (Low)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-476
Published	2026-03-30
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: emqx

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-30 21:17 UTCPublished CVE record published
2026-06-17 10:36 UTCUpdated Record last modified

emqx nanomq UPGRADE

Affected: < 0.24.7

Fixed in: 0.24.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy nanomq || rpm -q nanomq || nanomq --version

2. UPGRADE to 0.24.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nanomq

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nanomq

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-32696?

nanomq: upgrade to 0.24.7. Exact commands for each OS are on this page.

Is CVE-2026-32696 being exploited?

CVE-2026-32696 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-32696 affect?

CVE-2026-32696 affects nanomq. Severity is low (CVSS 3.1). NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. In NanoMQ version 0.24.6, after enabling auth.http_auth (HTTP authentication), when a client connects to the broker using MQTT CONNECT without providing username/password

How urgent is CVE-2026-32696?

Priority 25/100. Public exploit reference

Related CVEs

CVE-2026-36590 HIGH 7.5 DOWNGRADE An issue in EMQ NanoMQ v.0.24.9 allows a remote attacker to cause a denial of service via the nni_qos_db_set f
CVE-2026-34608 MEDIUM 4.9 UPGRADE NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform
CVE-2026-25627 MEDIUM 6.5 UPGRADE NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform
CVE-2026-22040 MEDIUM 5.3 UPGRADE NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform
CVE-2025-68699 MEDIUM 6.5 DOWNGRADE NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform

References

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