CVE-2026-34205: CWE-923: Improper Restriction of Communication Channel to Intended Endpoints in home-assistant Home Assistant Operating System
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.
AI Analysis
Technical Summary
Home Assistant Operating System versions up to 17.1 have a vulnerability (CWE-923) where apps configured with host network mode expose unauthenticated endpoints on the internal Docker bridge interface. On Linux, this configuration fails to restrict access as intended, enabling any device on the same local network to reach these endpoints without authentication. This can lead to full compromise of the system. The issue is fixed in Home Assistant Supervisor 2026.03.02.
Potential Impact
The vulnerability allows unauthenticated local network attackers to access exposed endpoints in Home Assistant apps, potentially leading to full compromise of confidentiality, integrity, and availability of the Home Assistant Operating System. The CVSS score of 9.7 reflects critical impact with network attack vector, low attack complexity, no privileges or user interaction required, and scope change.
Mitigation Recommendations
Upgrade to Home Assistant Supervisor version 2026.03.02 or later, which addresses this vulnerability. Until the update is applied, restrict network access to the local network and avoid using host network mode for Home Assistant apps on Linux if possible. Patch status is confirmed as fixed in the specified Supervisor version.
CVE-2026-34205: CWE-923: Improper Restriction of Communication Channel to Intended Endpoints in home-assistant Home Assistant Operating System
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Home Assistant Operating System versions up to 17.1 have a vulnerability (CWE-923) where apps configured with host network mode expose unauthenticated endpoints on the internal Docker bridge interface. On Linux, this configuration fails to restrict access as intended, enabling any device on the same local network to reach these endpoints without authentication. This can lead to full compromise of the system. The issue is fixed in Home Assistant Supervisor 2026.03.02.
Potential Impact
The vulnerability allows unauthenticated local network attackers to access exposed endpoints in Home Assistant apps, potentially leading to full compromise of confidentiality, integrity, and availability of the Home Assistant Operating System. The CVSS score of 9.7 reflects critical impact with network attack vector, low attack complexity, no privileges or user interaction required, and scope change.
Mitigation Recommendations
Upgrade to Home Assistant Supervisor version 2026.03.02 or later, which addresses this vulnerability. Until the update is applied, restrict network access to the local network and avoid using host network mode for Home Assistant apps on Linux if possible. Patch status is confirmed as fixed in the specified Supervisor version.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-03-26T15:57:52.323Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69c6e1b93c064ed76febd41a
Added to database: 3/27/2026, 7:59:53 PM
Last enriched: 4/4/2026, 10:49:43 AM
Last updated: 5/12/2026, 1:40:58 AM
Views: 374
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