CVE-2026-61633

NanoMQ is an MQTT broker. Prior to 0.24.14, the NanoMQ client function nnimqttmsgdecodeunsubscribe in nng/src/supplemental/mqtt/mqttcodec.c does not handle a failed readuint16 while counting topics in a malformed UNSUBSCRIBE packet. A zero-length topic followed by trailing data can leave buf.curp...

CVE-2026-44639

NanoMQ is an MQTT broker. Prior to 0.24.14, NanoMQ's MQTT v5 property decoder in nng/src/supplemental/mqtt/mqttcodec.c uses propertyappend to walk the entire linked list for each property added by decodebufproperties. A remote unauthenticated client can supply a PUBLISH or SUBSCRIBE packet...

CVE-2026-73863 NanoMQ: Heap-Buffer-Overflow in `nmq_subinfo_decode()` During MQTT v5 SUBSCRIBE Parsing

NanoMQ is an MQTT broker. Prior to 0.24.14, NanoMQ's broker-side MQTT v5 nmqsubinfodecode function in nng/src/sp/protocol/mqtt/mqttparser.c reuses lenofvarint from the outer Properties Length while parsing each SUBSCRIPTIONIDENTIFIER. A remote client can send a SUBSCRIBE packet with a multi-byte...

EUVD-2026-83050

NanoMQ is an MQTT broker. Prior to 0.24.14, NanoMQ's broker-side MQTT v5 nmqsubinfodecode function in nng/src/sp/protocol/mqtt/mqttparser.c reuses lenofvarint from the outer Properties Length while parsing each SUBSCRIPTIONIDENTIFIER. A remote client can send a SUBSCRIBE packet with a multi-byte...

CVE-2026-73863

NanoMQ, an MQTT broker, contains a heap-buffer-overflow in the broker-side function nmq_subinfo_decode() located in nng/src/sp/protocol/mqtt/mqtt_parser.c. The root cause is an incorrect reuse of the len_of_varint value from the outer Properties Length field when parsing repeated SUBSCRIPTION_IDE...

CVE-2026-61633 NanoMQ: Infinite Loop in UNSUBSCRIBE Decoder Leading to Remote DoS

NanoMQ is an MQTT broker. Prior to 0.24.14, the NanoMQ client function nnimqttmsgdecodeunsubscribe in nng/src/supplemental/mqtt/mqttcodec.c does not handle a failed readuint16 while counting topics in a malformed UNSUBSCRIBE packet. A zero-length topic followed by trailing data can leave buf.curp...

CVE-2026-61633

NanoMQ (MQTT broker) contains a flaw in its client-side function nni_mqtt_msg_decode_unsubscribe() in mqtt_codec.c. A malformed UNSUBSCRIBE packet with a zero-length topic followed by trailing data can cause a failed read_uint16() that leaves the buffer position unchanged while the topic count ke...

EUVD-2026-83048

NanoMQ is an MQTT broker. Prior to 0.24.14, the NanoMQ client function nnimqttmsgdecodeunsubscribe in nng/src/supplemental/mqtt/mqttcodec.c does not handle a failed readuint16 while counting topics in a malformed UNSUBSCRIBE packet. A zero-length topic followed by trailing data can leave buf.curp...

CVE-2026-61633 NanoMQ: Infinite Loop in UNSUBSCRIBE Decoder Leading to Remote DoS

NanoMQ is an MQTT broker. Prior to 0.24.14, the NanoMQ client function nnimqttmsgdecodeunsubscribe in nng/src/supplemental/mqtt/mqttcodec.c does not handle a failed readuint16 while counting topics in a malformed UNSUBSCRIBE packet. A zero-length topic followed by trailing data can leave buf.curp...

CVE-2026-44639 NanoMQ: O(N²) Denial of Service in MQTT v5 Property Parsing

NanoMQ is an MQTT broker. Prior to 0.24.14, NanoMQ's MQTT v5 property decoder in nng/src/supplemental/mqtt/mqttcodec.c uses propertyappend to walk the entire linked list for each property added by decodebufproperties. A remote unauthenticated client can supply a PUBLISH or SUBSCRIBE packet...

CVE-2026-44639 NanoMQ: O(N²) Denial of Service in MQTT v5 Property Parsing

NanoMQ is an MQTT broker. Prior to 0.24.14, NanoMQ's MQTT v5 property decoder in nng/src/supplemental/mqtt/mqttcodec.c uses propertyappend to walk the entire linked list for each property added by decodebufproperties. A remote unauthenticated client can supply a PUBLISH or SUBSCRIBE packet...

EUVD-2026-83047

NanoMQ is an MQTT broker. Prior to 0.24.14, NanoMQ's MQTT v5 property decoder in nng/src/supplemental/mqtt/mqttcodec.c uses propertyappend to walk the entire linked list for each property added by decodebufproperties. A remote unauthenticated client can supply a PUBLISH or SUBSCRIBE packet...

CVE-2026-44639

NanoMQ , an MQTT broker, is vulnerable to an O(N²) denial of service in its MQTT v5 property decoder (in nng/src/supplemental/mqtt/mqtt_codec.c). The root cause is that property_append() traverses the entire linked list for each property added by decode_buf_properties(), resulting in quadratic CP...

NanoMQ-Memory-Leak-Research

CVE-2026-36590：EMQ NanoMQ v0.24.9 中的拒绝服务漏洞 本仓库包含 CVE-2026-36590 的公开公告和技术分析，这是一项影响 EMQ NanoMQ v0.24.9 的拒绝服务漏洞。 审核说明 本仓库公开旨在为 CVE 审核提供可访问的技术参考。CVE-2026-36590 的最终分类将由 CVE 团队或相关 CNA 决定。 NanoMQ 团队对该问题提出异议，并认为其与配置相关。本仓库侧重于技术证据，包括复现材料、ASAN 结果、运行时日志和源码分析。 公告信息 CVE ID：CVE-2026-36590 厂商/项目：EMQ / NanoMQ...

CVE-2026-47276

In nanomq versions 0.24.11 and earlier, a NULL pointer dereference in propertiesparse allows an authenticated attacker to crash the NanoMQ broker by sending a POST request to /api/v4/mqtt/publish with userproperties as a JSON array instead of a JSON object. The crash occurs because strlen is call...

CVE-2026-47275

In nanomq versions 0.24.11 and earlier, a NULL pointer dereference in nnimqttv5msgdecodeconnect allows a malicious MQTT broker to crash any connecting NanoMQ MQTTv5 client including bridge mode with a single packet, causing remote denial of service via SIGSEGV. In nnimqttv5msgdecodeconnect...

CVE-2026-35217

NanoMQ contains a protocol-semantics flaw in its MQTT v5 SUBSCRIBE handling: if a subscription entry is missing the final 1-byte Subscription Options field, the broker may still accept the malformed packet and install the subscription into internal broker state. Under a specific packet-length...

CVE-2026-47276

CVE-2026-47276 affects NanoMQ up to version 0.24.11: a NULL pointer dereference in properties_parse() when processing user_properties, allowing an authenticated attacker to crash the broker by sending a crafted POST to /api/v4/mqtt/publish with user_properties as a JSON array (strlen on a NULL it...

CVE-2026-47276 NULL Pointer Dereference in REST API properties_parse via Malformed user_properties

In nanomq versions 0.24.11 and earlier, a NULL pointer dereference in propertiesparse allows an authenticated attacker to crash the NanoMQ broker by sending a POST request to /api/v4/mqtt/publish with userproperties as a JSON array instead of a JSON object. The crash occurs because strlen is call...

CVE-2026-47275 nanomq NULL Pointer Dereference in MQTTv5 Client CONNECT Decoder Leading to Remote DoS

In nanomq versions 0.24.11 and earlier, a NULL pointer dereference in nnimqttv5msgdecodeconnect allows a malicious MQTT broker to crash any connecting NanoMQ MQTTv5 client including bridge mode with a single packet, causing remote denial of service via SIGSEGV. In nnimqttv5msgdecodeconnect...