Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-71259— ESPHome external_components file:// Scheme Validation Bypass Leading to Remote Code Execution

Quick assessment

Affected
esphome esphome
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ESPHome是ESPHome组织开源的一款智能家居设备控制平台。 ESPHome 2026.7.0-dev及之前版本存在输入验证错误漏洞，该漏洞源于cv.url()验证器中存在运算符优先级错误，导致攻击者可通过特制的external_components配置块绕过验证并执行任意Python代码。

CVSS 8.6 · High EPSS 0.17% · P6

Affected Version Matrix 1

VendorProduct Version RangeStatus
esphome esphome ≤ 2026.7.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-71259

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
ESPHome external_components file:// Scheme Validation Bypass Leading to Remote Code Execution
Source: CVE Program / CVE List V5
Vulnerability 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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不完整的黑名单
Source: CVE Program / CVE List V5
Vulnerability Title
ESPHome 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ESPHome是ESPHome组织开源的一款智能家居设备控制平台。 ESPHome 2026.7.0-dev及之前版本存在输入验证错误漏洞，该漏洞源于cv.url()验证器中存在运算符优先级错误，导致攻击者可通过特制的external_components配置块绕过验证并执行任意Python代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
esphome esphome 0 ~ 2026.7.0 -

II. Public POCs for CVE-2026-71259

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 7693 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-71259

请登录查看更多情报信息。

Vendor Pages for CVE-2026-71259 (1)

IV. Related Vulnerabilities

Same product: esphome
Same vendor: esphome
Same weakness: CWE-184

V. Comments for CVE-2026-71259

No comments yet

Leave a comment