CVE-2026-61633

Published: Set 18, 2026 Last Modified: Set 18, 2026

ExploitDB:

Other exploit source:

Google Dorks:

LOW 2,0

Source: [email protected]

Attack Vector: network

Attack Complexity: high

Privileges Required: high

User Interaction: required

Scope: unchanged

Confidentiality: none

Integrity: none

Availability: low

Description

AI Translation Available

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.