CVE-2026-44640

NanoMQ: QUIC Dialer Close Type Confusion

CVSS 4.5 MEDIUMEPSS 0.1%CWE-843

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.5EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

29 May 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

nanomq · nanomq

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References

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