CVE-2026-46411— FlashMQ: Client can trigger uncaught exception on FlashMQ 1.26.1 and older
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-46411
Vulnerability Information
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Vulnerability Title
FlashMQ: Client can trigger uncaught exception on FlashMQ 1.26.1 and older
Source: NVD (National Vulnerability Database)
Vulnerability Description
FlashMQ is a MQTT broker/server, designed for multi-CPU environments. Prior to version 1.26.2, authorized clients have the ability to exceed the permitted over-commit of their write buffer and triggering an internal safe-guard exception. This exception was in a path that was not catchable, and therefore causes a server abort. This issue has been patched in version 1.26.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未捕获的异常
Source: NVD (National Vulnerability Database)
Vulnerability Title
FlashMQ 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FlashMQ是Wiebe Cazemier个人开发者的一个快速轻量级的MQTT代理服务器。 FlashMQ 1.26.2之前版本存在安全漏洞，该漏洞源于授权客户端可超出写缓冲区的允许超额提交，触发内部安全保护异常，导致服务器中止。
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
II. Public POCs for CVE-2026-46411
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Patches & Fixes for CVE-2026-46411 (1)
Vendor Advisories for CVE-2026-46411 (1)
Other References for CVE-2026-46411 (1)
- 🔗 Release FlashMQ 1.26.2 · halfgaar/FlashMQ · GitHubx_refsource_MISC
IV. Related Vulnerabilities
Same weakness: CWE-248
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V. Comments for CVE-2026-46411
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