CVE-2026-34205 — Home Assistant: Unauthenticated App (Add-on) Endpoints Exposed to Local Network via Host Network Mode

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
home-assistant / Home Assistant Operating System	affected <= 17.1
home-assistant / Home Assistant Supervisor	affected < 2026.03.2

CWE

CWE-923

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.