CVE-2026-44640 PUBLISHED

NanoMQ: QUIC Dialer Close Type Confusion

Assigner: GitHub_M
Reserved: 07.05.2026 Published: 29.05.2026 Updated: 29.05.2026

NanoMQ MQTT Broker (NanoMQ) is an all-around Edge Messaging Platform. Prior to 0.24.14, aio->prov_data is stored as nni_quic_conn during dialing, but read as ex_quic_conn during dialer close. This type confusion causes invalid object interpretation and leads to close-path hang/crash behavior. This vulnerability is fixed in 0.24.14.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
CVSS Score: 4.5

Attack Vector	Local	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	Low
Privileges Required	None	Integrity Impact	Low
User Interaction	Required	Availability Impact	Low

CVSS 3.1

Product Status

Vendor	nanomq
Product	nanomq
Versions	Version < 0.24.14 is affected

References

https://github.com/nanomq/nanomq/security/advisories/GHSA-9fgw-v323-jmjj
https://github.com/nanomq/nanomq/releases/tag/0.24.14

Problem Types

CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') CWE