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CVE-2026-55844— Home Assistant: iOS Companion App ignores internal SSID allowlist for connections – possible leak of access token and sensor data

Quick assessment

Affected
home-assistant core
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Home Assistant是Home Assistant组织开源的一套开源的家庭自动化管理系统。该系统主要用于控制家庭自动化设备。 Home Assistant 2025.5.0之前版本存在加密问题漏洞，该漏洞源于iOS companion app在连接不安全网络时，会回退到内部URL并暴露用户令牌。

CVSS 7.5 · High EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
home-assistant core < 2025.5.0 affected
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I. Basic Information for CVE-2026-55844

Vulnerability Information
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Vulnerability Title
Home Assistant: iOS Companion App ignores internal SSID allowlist for connections – possible leak of access token and sensor data
Source: CVE Program / CVE List V5
Vulnerability Description
Home Assistant is open source home automation software that puts local control and privacy first. Prior to 2025.5.0, The iOS companion app ignores the SSID allowlist for internal networks. The app uses SSID to detect when to use the internal URL, but whenever the app cannot find any other URL to be used, it fallbacks to the internal URL as well, which can expose user's token when connected to a not secure network. This vulnerability is fixed in 2025.5.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文传输
Source: CVE Program / CVE List V5
Vulnerability Title
Home Assistant 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Home Assistant是Home Assistant组织开源的一套开源的家庭自动化管理系统。该系统主要用于控制家庭自动化设备。 Home Assistant 2025.5.0之前版本存在加密问题漏洞，该漏洞源于iOS companion app在连接不安全网络时，会回退到内部URL并暴露用户令牌。
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
home-assistant core < 2025.5.0 -

II. Public POCs for CVE-2026-55844

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III. Intelligence Information for CVE-2026-55844

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Vendor Advisories for CVE-2026-55844 (1)

IV. Related Vulnerabilities

Same product: core
Same vendor: home-assistant
Same weakness: CWE-319

V. Comments for CVE-2026-55844

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