CVE-2026-71259 — ESPHome external_components file:// Scheme Validation Bypass Leading to Remote Code Execution

CVE-2026-71259

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

Description (CNA)

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).

Affected (CNA)

Vendor / product	Versions
esphome / esphome	affected 0 through 2026.7.0

CWE

CWE-184

References

https://github.com/esphome/esphome
https://github.com/esphome/esphome/blob/dev/esphome/config_validation.py

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.