CVE-2026-34205 is a critical vulnerability affecting Home Assistant Supervisor versions prior to 2026.03.02. It allows apps configured in host network mode on Linux to expose unauthenticated endpoints to the local network, enabling any device on that network to access them without authentication. Rated 9.6 CRITICAL (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H), this flaw permits an unauthenticated adjacent network attacker to achieve high impact on confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, and no public exploit code is available. Users are advised to upgrade to Home Assistant Supervisor 2026.03.02 to address this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| Home-Assistant | Home Assistant Operating System | <= 17.1CNA affected | |
| Home-Assistant | Home Assistant Supervisor | < 2026.03.2CNA affected |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.4 Bluesky, 0.2 Mastodon, and 1.3 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.