CVE-2026-71259CWE-184

CVE-2026-71259

High · published August 5, 2026

CVSS v3.1
8.6
EPSS
0%
Percentile
6.5
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
8.6 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00174 · 6.5th percentile
Weakness
CWE-184 · Incomplete List of Disallowed Inputs
Published
2026-08-05T17:24Z
References (2)
https://github.com/esphome/esphome · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2chttps://github.com/esphome/esphome/blob/dev/esphome/config_validation.py · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
EPSS history
Timeline
  • 05 AUG 12:26Z
    ESPHome external_components file:// Scheme Validation Bypass Leading to Remote Code Execution
    cvelistv5