Home Assistant Companion: `homeassistant://invite` Deep Link Credential Phishing

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-59717
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-07 21:17:29 UTC
Updated2026-08-07 21:17:29 UTC
DescriptionHome 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.

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Problem Types: CWE-601 | CWE-939 | CWE-601 CWE-601: URL Redirection to Untrusted Site ('Open Redirect') | CWE-939 CWE-939: Improper Authorization in Handler for Custom URL Scheme

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Home-assistant Core affected < 2026.6.1 Not specified

References

ReferenceSourceLinkTags
github.com/home-assistant/android/commit/26154d923c3813cd4650e124900780f... [email protected] github.com
github.com/home-assistant/android/pull/6955 [email protected] github.com
github.com/home-assistant/core/security/advisories/GHSA-68f4-97mf-f68w 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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