CVE-2026-8686— DoS from MQTT v5.0 Deserialization Fault in core MQTT
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-8686
Vulnerability Information
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Vulnerability Title
DoS from MQTT v5.0 Deserialization Fault in core MQTT
Source: NVD (National Vulnerability Database)
Vulnerability Description
Missing bounds validation in the MQTT v5.0 property parser in coreMQTT before 5.0.1 allows an MQTT broker to cause a denial of service by sending a crafted packet. To remediate this issue, users should upgrade to v5.0.1.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
跨界内存读
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-8686
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 11290 chars
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III. Intelligence Information for CVE-2026-8686
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- https://github.com/FreeRTOS/coreMQTT/security/advisories/GHSA-6qh9-r6jp-2wxcthird-party-advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-8686
IV. Related Vulnerabilities
V. Comments for CVE-2026-8686
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