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CVE-2026-71279— Zigbee2MQTT External JS Extension Path Traversal Leading to Remote Code Execution

Quick assessment

Affected
Koenkk zigbee2mqtt
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Koen Kanters Zigbee2MQTT是Koen Kanters个人开发者的一个连接Zigbee与MQTT的智能家居桥接软件。 Koen Kanters Zigbee2MQTT 2.12.0及之前版本存在路径遍历漏洞，该漏洞源于ExternalJSExtension.getFilePath()函数在处理name参数时未进行清理，使用path.join拼接路径导致路径遍历，攻击者可通过MQTT消息构造恶意文件路径，实现远程代码执行或任意文件删除。

CVSS 8.1 · High EPSS 0.36% · P30

Affected Version Matrix 1

VendorProduct Version RangeStatus
Koenkk zigbee2mqtt ≤ 2.12.0 affected
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I. Basic Information for CVE-2026-71279

Vulnerability Information
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Vulnerability Title
Zigbee2MQTT External JS Extension Path Traversal Leading to Remote Code Execution
Source: CVE Program / CVE List V5
Vulnerability Description
Zigbee2MQTT's ExternalJSExtension.getFilePath (lib/extension/externalJS.ts) joins a parameter received via an MQTT message (topic zigbee2mqtt/bridge/request/extension/save) into the extensions base path using path.join(basePath, name) with no sanitization. The extension handler only validates that the name ends in .js/.mjs/.cjs, writes the file, and then dynamically imports it via Node.js import, achieving remote code execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Koen Kanters Zigbee2MQTT 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Koen Kanters Zigbee2MQTT是Koen Kanters个人开发者的一个连接Zigbee与MQTT的智能家居桥接软件。 Koen Kanters Zigbee2MQTT 2.12.0及之前版本存在路径遍历漏洞，该漏洞源于ExternalJSExtension.getFilePath()函数在处理name参数时未进行清理，使用path.join拼接路径导致路径遍历，攻击者可通过MQTT消息构造恶意文件路径，实现远程代码执行或任意文件删除。
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
Koenkk zigbee2mqtt 0 ~ 2.12.0 -

II. Public POCs for CVE-2026-71279

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 7682 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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Full executable POC code
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III. Intelligence Information for CVE-2026-71279

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Other References for CVE-2026-71279 (1)

IV. Related Vulnerabilities

Same weakness: CWE-22

V. Comments for CVE-2026-71279

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