What is CVE-2026-44640?

CVE-2026-44640 is a medium-severity vulnerability in Nanomq, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 4.5/10. Published 2026-05-29.

How severe is CVE-2026-44640?

Medium severity. CVSS v3 base score is 4.5 out of 10.

Vulnerability in Nanomq

CVE-2026-44640

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 int…

EPSS: 0.000 (2.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.5 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L.

Affected products

Nanomq — versions < 0.24.14

Weakness classification (CWE)

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

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-44640?: CVE-2026-44640 is a medium-severity vulnerability in Nanomq, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 4.5/10. Published 2026-05-29.
How severe is CVE-2026-44640?: Medium severity. CVSS v3 base score is 4.5 out of 10.