CVE-2026-34205

CRITICAL

Home Assistant: Unauthenticated App (Add-on) Endpoints Exposed to Local Network via Host Network Mode

Title source: CVE List
STIX 2.1 vulnerability

Record summary

CVE-2026-34205 has a selected CVSS score of 9.7 (critical).

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.

Description source: CVE List

Exploitation context

CISA SSVC decision

ExploitationNone
AutomatableNo
Technical impactTotal

CISA Coordinator · SSVC 2.0.3 · Evaluated Mar 31, 2026 · Source: CVE List

Affected products and versions

2
ProductSourceVersion range

Home Assistant Operating System

Browse home-assistant / Home Assistant Operating System
CVE List<= 17.1affected

Home Assistant Supervisor

Browse home-assistant / Home Assistant Supervisor
CVE List< 2026.03.2affected

References

1