CVE-2026-71259

8.6 HIGHpublic exploit available

Published 2026-08-05 · Updated 2026-08-10

AI risk analysis

Summary: The flaw allows any file: URI to pass validation due to an operator-precedence bug, enabling unauthorized access to local files.
Exploitability: Exploitation is relatively easy as it requires only crafting a specific file: URI without netloc, but the attacker must have write permissions to create or modify configuration files.
Blast radius: If exploited, this could lead to data exfiltration, code execution, or other unauthorized actions on local systems.
Prioritized remediation: Update to the latest version of ESPHome (2026.7.1 or later) which includes a fix for this issue.

rcefile-inclusionconfig-validationlocal-privilege-escalation

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

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 vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Weaknesses

CWE-184

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.