CVE-2026-71259: high-severity vulnerability in esphome
ESPHome external_components file:// Scheme Validation Bypass Leading to Remote Code Execution
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.6epss 0.2%
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).
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Affected products
esphome · esphomeRelated CVEs — esphome
In the same product, most dangerous first.
CVE-2025-57808HIGHESP-IDF web_server basic auth bypass using empty or incomplete Authorization headerEPSS 1.5%CVE-2024-27081HIGHESPHome remote code execution via arbitrary file writeEPSS 1.5%CVE-2021-41104HIGHweb_server allows OTA update without checking user defined basic auth username & passwordEPSS 1.2%CVE-2024-27287MEDIUMESPHome vulnerable to stored Cross-site Scripting in edit configuration file APIEPSS 0.7%CVE-2026-23833LOWESPHome vulnerable to denial-of-service via out-of-bounds check bypass in the API componentEPSS 0.3%CVE-2026-71260MEDIUMESPHome web_server Plaintext Password Disclosure via JSON "value" FieldEPSS 0.3%