CVE-2026-44639 (GCVE-0-2026-44639)
Vulnerability from cvelistv5
Published
2026-09-18 16:17
Modified
2026-09-18 17:21
Severity ?
3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE
  • CWE-407 - Inefficient Algorithmic Complexity
Summary
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.
References
Impacted products
Vendor Product Version
nanomq nanomq Version: < 0.24.14
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