CVE-2026-54317

HIGH CVSS 3.1: 7.6 EPSS 0.29%
Updated Jun 26, 2026
Home-Assistant
Parameter Value
CVSS 7.6 (HIGH)
Affected Versions before 2026.6.0
Fixed In 2026.6.0
Type CWE-200 (Information Exposure), CWE-306 (Missing Authentication for Critical Function)
Vendor Home-Assistant
Public PoC No

Home Assistant is open source home automation software that puts local control and privacy first. Prior to 2026.6.0, the Konnected integration registers an HTTP endpoint, KonnectedView (homeassistant/components/konnected/__init__.py), that is marked as not requiring authentication (requires_auth = False). A comment next to that line says auth is instead handled "via the access token from configuration." That promise is only half true.

Write requests (POST and PUT) are handled by update_sensor(), which does check the request's Authorization: Bearer <token> header against the integration's stored access tokens (using hmac.compare_digest). Read requests (GET) are handled by a separate get() method that has no authentication check at all. This vulnerability is fixed in 2026.6.0.

Attack Parameters

Attack Vector
Adjacent
Requires local network access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Home-Assistant Home-Assistant
cpe:2.3:a:home-assistant:home-assistant:*:*:*:*:*:*:*:*
2026.6.0