CVE-2026-59717
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk12th percentile - higher than 12% of all known CVEs
Summary
Home Assistant before version 2026.6.1 has an open redirect vulnerability in the Android Companion app. The app passes the URL fragment from a homeassistant://invite deep link into the onboarding flow without displaying the destination hostname, allowing an attacker to craft an invite that leads to a look-alike login page capturing credentials.
Risk Assessment
The risk includes potential credential theft for new users through fake login pages, which could lead to account takeover.
Recommendation
Update the Android Companion app to version 2026.6.1 or later. Educate users about the risks of invite links.
Original NVD description (English source)
Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.6.1, the Android Companion app is vulnerable to an open redirect. The app passes the URL fragment from a homeassistant://invite deep link into the onboarding flow without ever displaying the destination hostname. Because no screen in the invitation or onboarding flow shows the parsed server URL before onboarding commits to it, a victim has no way to distinguish a legitimate invite from a malicious one. An attacker can craft an invite so that a single tap on the legitimate-looking "Connect to my Home Assistant server" button opens their /auth/authorize endpoint in the URL-less onboarding WebView, presenting a look-alike login page that captures the victim's credentials. Since invitations are intended to onboard brand-new users, targets are especially unlikely to notice the substitution. This issue is fixed in version 2026.6.1.