Vulnerabilities CVE-2026-71259

CVE-2026-71259

High

Open

TLP:CLEAR

ESPHome external_components file:// Scheme Validation Bypass Leading to Remote Code Execution

NVD CVE.org

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Description

ESPHome through 2026.7.0-dev contains an operator-precedence bug in the cv.url validator in esphome/config_validation.py. Because binds tighter than , any file: URI passes validation regardless of netloc. This validator gates the field of the external_components YAML directive's git source schema, which is passed to (git supports file:// natively).

Details

CVSS Score: 8.6
EPSS Score ⓘ: 0.12%

2th percentile
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Confidence: 90%
Published: Aug 5, 2026
Last Modified: Aug 10, 2026

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