Low 3.1Published Mar 30, 2026

CVE-2026-32696NanoMQ HTTP Auth: Missing username/password can trigger a NULL-pointer strlen() in auth_http.c:set_data(), causing a process crash — SIGSEGV, remotely triggerable

Updated under an hour ago (Oct 26, 2026, 8:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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 pointer, causing a SIGSEGV crash. This crash can be triggered remotely, resulting in a denial of service. This issue has been patched in version 0.24.7.

CVSS: 3.1 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Mar 31, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nanomq nanomq nanomq:nanomq (from the name)	from 0.24.6, < 0.24.7	CNA record
emqx nanomq emqx:nanomq	before 0.24.7	NVD

References

References

https://github.com/nanomq/nanomq/security/advisories/GHSA-77f4-wvq8-mp3p	x-refsource-confirm, exploit, vendor-advisory
https://github.com/nanomq/NanoNNG/pull/1394	x-refsource-misc, issue-tracking, patch
https://github.com/nanomq/NanoNNG/commit/c20aa27e5290bb480a5315099952480d35f37a8b	x-refsource-misc, patch
https://github.com/nanomq/nanomq/releases/tag/0.24.7	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.