{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-71259","assignerOrgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","state":"PUBLISHED","assignerShortName":"TuranSec","dateReserved":"2026-08-05T12:23:34.966Z","datePublished":"2026-08-05T12:26:07.879Z","dateUpdated":"2026-08-10T11:46:20.128Z"},"containers":{"cna":{"title":"ESPHome external_components file:// Scheme Validation Bypass Leading to Remote Code Execution","descriptions":[{"lang":"en","value":"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).","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>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).</p>"}]}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-184","cweId":"CWE-184","type":"CWE"}]}],"affected":[{"vendor":"esphome","product":"esphome","programFiles":["esphome/config_validation.py","esphome/components/external_components/__init__.py"],"versions":[{"version":"0","lessThanOrEqual":"2026.7.0","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","baseScore":8.6,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}}],"references":[{"url":"https://github.com/esphome/esphome","tags":["third-party-advisory"]},{"url":"https://github.com/esphome/esphome/blob/dev/esphome/config_validation.py","tags":["third-party-advisory"]}],"credits":[{"lang":"en","value":"Alibek Baxtiyorov","type":"finder"}],"providerMetadata":{"orgId":"309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c","shortName":"TuranSec","dateUpdated":"2026-08-10T11:46:20.128Z"},"source":{"discovery":"EXTERNAL"},"datePublic":"2026-08-05T12:26:07.879Z"},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-05T15:29:11.971575Z","id":"CVE-2026-71259","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-05T15:29:29.949Z"}}]}}