Vulnerability details
CVE-2026-34205
home-assistant Home Assistant Operating Systemhome-assistant Home Assistant Supervisor
Home Assistant: Unauthenticated App (Add-on) Endpoints Exposed to Local Network via Host Network Mode
CVSS 3.1
9.7Critical
Official 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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.7Critical | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| home-assistant | Home Assistant Operating System | <= 17.1 | CVEProject cvelistV5 (CNA) |
| home-assistant | Home Assistant Supervisor | < 2026.03.2 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://github.com/home-assistant/core/security/advisories/GHSA-gh5m-4m97-c95h x_refsource_CONFIRM
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Details
- Published
- 2026-03-27
- Last updated
- 2026-04-01
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.26%
Probability of exploitation in 30 days
19%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-923Improper Restriction of Communication Channel to Intended Endpoints