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TI-2026-47038 Aliases CVE-2026-66061

Home Assistant: iOS Companion app forwards NFC/QR tag scans without confirmation, enabling silent automation execution

Priority MEDIUM 64CWE-862Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.5.0, the iOS Companion app treats tag links (NFC or QR) delivered through an OS-level routing mechanism such as iOS universal links as if they were physically scanned, without validating the calling app or prompting the user. As a result, any untrusted app on the device can forward an arbitrary tag to Home Assistant, causing it to execute the associated automation as though a legitimate user had scanned an authorized tag. This allows silent, unattended automation execution by untrusted local callers. This issue has been fixed in version 2026.5.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00166 5th percentileScored 2026-11-07
Fix Fixed core (home-assistant): 2026.5.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
home-assistantcorebefore 2026.5.02026.5.0Patch availableCNA
  • core Vendorhome-assistant Affected before 2026.5.0 Fixed in 2026.5.0 Patch available CNA

Remediation

  • Fix · CNA core (home-assistant) Fixed in 2026.5.0

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-66061

References

Other 2

  • TI-2023-12210 Improper authentication in home-assistant core CVSS 3.1CRITICAL 10.0
  • TI-2021-22555 Home Assistant Community Store 1.10.0 Path Traversal Account Takeover CVSS 4.0HIGH 8.7
  • TI-2026-61899 Home Assistant: XSS in Statistics Graph Card CVSS 4.0CRITICAL 9.3
  • TI-2026-46349 Home Assistant Core < 2026.7.0 Symlink Path Traversal RCE via backup-restore CVSS 4.0CRITICAL 9.3
  • TI-2026-40307 Cleartext transmission of sensitive information in home-assistant core CVSS 3.1HIGH 7.5
  • TI-2025-38490 Home Assistant vulnerable to Stored XSS in Energy dashboard from Energy Entity Name CVSS 4.0HIGH 8.5
See all 32 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences