Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.5.3, the Companion app treats tag links (NFC or QR) delivered through an OS-level routing mechanism 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 is fixed in version 2026.8.1.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
home-assistant:core
References 2
https://github.com/home-assistant/core/security/advisories/GHSA-2xqv-hwrf-983f
https://github.com/home-assistant/core/security/advisories/GHSA-2xqv-hwrf-983f
https://github.com/home-assistant/android/commit/968b49c58e4eba4d06371a3f6e7319…
https://github.com/home-assistant/android/commit/968b49c58e4eba4d06371a3f6e73198ec6c8d4a7