CVE-2026-54317 Home Assistant: Konnected alarm-panel switch state and zone topology disclosed to unauthenticated actors on the LAN

What is CVE-2026-54317?

CVE-2026-54317 is a high-severity vulnerability in home-assistant core, published on 23 Jun 2026.

Official description

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.

Weakness: CWE-306, CWE-200

Which versions are affected by CVE-2026-54317?

3 open source packages ship an affected version, including homeassistant. It affects 1 product.

Products include Home-Assistant Home-Assistant.

How do I fix CVE-2026-54317?

Upgrade homeassistant to 2026.6.0 or later.

Is CVE-2026-54317 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54317 exists.

Other vulnerabilities in home-assistant core

• CVE-2023-27482 Auth bypass in core Critical 10.0
• CVE-2023-41895 Cross-site Scripting via auth_callback login in Home Assistant Core High 8.8
• CVE-2023-41897 Lack of XFO header allows clickjacking in Home Assistant Core High 8.8
• CVE-2020-36517 Information disclosure in n/a High 7.5
• CVE-2018-21019 Home Assistant information disclosure vulnerability High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-x84v-g949-293w, PYSEC-2026-241.