Paper/Archive/CVE-2026-34205

CVE-2026-34205

home-assistant Home Assistant Operating System — Home Assistant: Unauthenticated App (Add-on) Endpoints Exposed to Local Network via Host Network Mode

EPSS 0.3%CVSS 9.7

critical.is priorityof 100

CVSS 9.7 (CNA)9.7 / 10 × 3029.1 Not in CISA KEV+300.0 EPSS percentile 19.0.190 × 203.8 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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

ProductAffectedFixed inSource

Home Assistant Operating System<= 17.1–CNA

Home Assistant Supervisor< 2026.03.2–CNA

Scores by source

GitHub_M (CNA)9.7CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refgithub.com/home-assistant/core/security/advisories/GHSA-gh5m-4m97-c95h