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

ESPHome through 2026.7.0-dev contains an operator-precedence bug in the cv.url validator in esphome/configvalidation.py: if parsed.scheme and parsed.netloc or parsed.scheme == "file": return parsed.geturl. Because and binds tighter than or, any file: URI passes validation regardless of netloc. Th...