CVE Watch18 sept 2026

CVE-2026-61633

NanoMQ is an MQTT broker. Prior to 0.24.14, the NanoMQ client function nni_mqtt_msg_decode_unsubscribe() in nng/src/supplemental/mqtt/mqtt_c

CVSS

2.0

Bajo

EPSS

0.3%

p17

KEV

—

Exploit Today

0-100

Publicado: 18 sept 2026 · Última mod.: 18 sept 2026 · CWE-835

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

NanoMQ is an MQTT broker. Prior to 0.24.14, the NanoMQ client function nni_mqtt_msg_decode_unsubscribe() in nng/src/supplemental/mqtt/mqtt_codec.c does not handle a failed read_uint16() while counting topics in a malformed UNSUBSCRIBE packet. A zero-length topic followed by trailing data can leave buf.curpos unchanged while topic_count continues to increase, allowing a malicious MQTT broker to hang a connecting MQTT 3.1.1 client, consume CPU and memory, and repeatedly deny service when automatic reconnection is enabled. The broker-side nmq_unsubinfo_decode path is not affected. This issue is fixed in version 0.24.14.

Referencias oficiales

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