{"id":"CVE-2026-44639","published":"2026-09-18T17:16:57.127","lastModified":"2026-09-18T18:17:06.990","description":"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.","cvssScore":3.7,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cwes":["CWE-407"],"vendors":[],"products":[],"references":[{"url":"https://github.com/nanomq/NanoNNG/commit/91bd4c7f45f945a3f5f0e37c459157dc7c277a07","tags":[]},{"url":"https://github.com/nanomq/NanoNNG/pull/1508","tags":[]},{"url":"https://github.com/nanomq/nanomq/releases/tag/0.24.14","tags":[]},{"url":"https://github.com/nanomq/nanomq/security/advisories/GHSA-6mwg-445v-2qrv","tags":[]},{"url":"https://github.com/nanomq/nanomq/security/advisories/GHSA-6mwg-445v-2qrv","tags":[]}],"exploitRefs":[{"url":"https://github.com/nanomq/NanoNNG/commit/91bd4c7f45f945a3f5f0e37c459157dc7c277a07","tags":[]},{"url":"https://github.com/nanomq/NanoNNG/pull/1508","tags":[]},{"url":"https://github.com/nanomq/nanomq/releases/tag/0.24.14","tags":[]},{"url":"https://github.com/nanomq/nanomq/security/advisories/GHSA-6mwg-445v-2qrv","tags":[]},{"url":"https://github.com/nanomq/nanomq/security/advisories/GHSA-6mwg-445v-2qrv","tags":[]}],"hasPoc":true,"ai":null}