CVE-2026-71259
ESPHome external_components file:// Scheme Validation Bypass Leading to Remote Code Execution
CVSS Score
8.6
EPSS Score
0.0%
EPSS Percentile
0th
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).
| CWE | CWE-184 |
| Vendor | esphome |
| Product | esphome |
| Published | Aug 5, 2026 |
| Last Updated | Aug 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
esphome / esphome
0 ≤ 2026.7.0
References
Credits
Alibek Baxtiyorov