CVE-2026-34205 — CRITICAL (9.6)

Vulnerability Description

Home Assistant is open source home automation software that puts local control and privacy first. Home Assistant apps (formerly add-ons) configured with host network mode expose unauthenticated endpoints bound to the internal Docker bridge interface to the local network. On Linux, this configuration does not restrict access to the app as intended, allowing any device on the same network to reach these endpoints without authentication. Home Assistant Supervisor 2026.03.02 addresses the issue.

CVSS Score

9.6

CRITICAL

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-923

References

https://github.com/home-assistant/core/security/advisories/GHSA-gh5m-4m97-c95h

FAQ

What is CVE-2026-34205?

CVE-2026-34205 is a vulnerability with a CVSS score of 9.6 (CRITICAL). Home Assistant is open source home automation software that puts local control and privacy first. Home Assistant apps (formerly add-ons) configured with host network mode expose unauthenticated endpoi...

How severe is CVE-2026-34205?

CVE-2026-34205 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-34205?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.