Type Confusion in NanoMQ - CVE-2026-44640
Published: May 23, 2026
Vulnerability identifier: #VU132184
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-44640
CWE-ID: CWE-843
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: NanoMQ
Affected software:
NanoMQ
NanoMQ
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to type confusion in nng/src/supplemental/quic/msquic_dial.c when closing a QUIC dialer with a pending dial AIO. A remote attacker can trigger the dialer close path to cause a denial of service.
User interaction is required to initiate the vulnerable local code path.
How to mitigate CVE-2026-44640
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.