HIGH

CVE-2026-71279

2026-08-05 CVSS v3.1

CVSS

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.

Weakness (CWE)

CWE-22 Path Traversal

EPSS Score

0.36%

Probability of exploitation in next 30 days

30.2th percentile

References

https://github.com/Koenkk/zigbee2mqtt https://github.com/Koenkk/zigbee2mqtt/blob/master/lib/extension/externalJS.ts

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Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

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