Description
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.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| nanomq | nanomq | >= 0.24.6, < 0.24.7 |
References
- https://github.com/nanomq/NanoNNG/commit/c20aa27e5290bb480a5315099952480d35f37a8bPatch
- https://github.com/nanomq/NanoNNG/pull/1394Issue Tracking, Patch
- https://github.com/nanomq/nanomq/releases/tag/0.24.7Product, Release Notes
- https://github.com/nanomq/nanomq/security/advisories/GHSA-77f4-wvq8-mp3pExploit, Vendor Advisory
Timeline
- Published
- Mar 30, 2026
- Last modified
- Jun 17, 2026
- NVD status
- Analyzed