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CVE-2026-44640— NanoMQ: QUIC Dialer Close Type Confusion

Quick assessment

Affected
nanomq nanomq
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NanoMQ是美国EMQ开源的一款用于物联网边缘平台的轻量级快速 MQTT Broker。 NanoMQ 0.24.14之前版本存在安全漏洞，该漏洞源于aio->prov_data在拨号时存储为nni_quic_conn但在拨号器关闭时读取为ex_quic_conn，导致类型混淆并引起关闭路径挂起或崩溃行为。

CVSS 4.5 · Medium EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 1

VendorProduct Version RangeStatus
nanomq nanomq < 0.24.14 affected
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I. Basic Information for CVE-2026-44640

Vulnerability Information
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Vulnerability Title
NanoMQ: QUIC Dialer Close Type Confusion
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用不兼容类型访问资源(类型混淆)
Source: CVE Program / CVE List V5
Vulnerability Title
NanoMQ 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NanoMQ是美国EMQ开源的一款用于物联网边缘平台的轻量级快速 MQTT Broker。 NanoMQ 0.24.14之前版本存在安全漏洞，该漏洞源于aio->prov_data在拨号时存储为nni_quic_conn*但在拨号器关闭时读取为ex_quic_conn*，导致类型混淆并引起关闭路径挂起或崩溃行为。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
nanomq nanomq < 0.24.14 -

II. Public POCs for CVE-2026-44640

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III. Intelligence Information for CVE-2026-44640

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Vendor Advisories for CVE-2026-44640 (1)

Vendor Pages for CVE-2026-44640 (1)

IV. Related Vulnerabilities

Same product: nanomq
Same vendor: nanomq
Same weakness: CWE-843