low3.7
CVE-2026-44639
NanoMQ is an MQTT broker.
Impact
NanoMQ is an MQTT broker. Prior to 0.24.14, NanoMQ's MQTT v5 property decoder in nng/src/supplemental/mqtt/mqtt_codec.c uses property_append() to walk the entire linked list for each property added by decode_buf_properties(). A remote unauthenticated client can supply a PUBLISH or SUBSCRIBE packet containing many User Properties, causing O(N²) linked-list insertion and CPU work that makes the broker unresponsive; repeated packets can sustain the denial of service. This issue is fixed in version 0.24.14.
Affected products
| Product | Affected versions |
|---|---|
| NanoMQ Is An MQTT Broker. | before 0.24.14 |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/nanomq/NanoNNG/commit/91bd4c7f45f945a3f5f0e37c459157dc7c277a07
- https://github.com/nanomq/NanoNNG/pull/1508
- https://github.com/nanomq/nanomq/releases/tag/0.24.14
- https://github.com/nanomq/nanomq/security/advisories/GHSA-6mwg-445v-2qrv
- https://github.com/nanomq/nanomq/security/advisories/GHSA-6mwg-445v-2qrv