CVE-2026-59717 home-assistant CVE debrief

Who should care

Home Assistant users and administrators should be aware of this vulnerability and take steps to mitigate it. This includes verifying the authenticity of invites before connecting to Home Assistant servers and updating the Android Companion app to version 2026.6.1 or later.

Why it matters

CVE-2026-59717 is a medium-severity vulnerability in the Home Assistant Android Companion app that allows for open redirects, potentially leading to phishing attacks and credential capture. Users and administrators should verify invite authenticity and update to version 2026.6.1 or later to mitigate this vulnerability.

• Phishing attacks may be attempted using crafted invites
• Credentials may be captured by malicious actors
• Users may be redirected to malicious pages
• Additional security measures may be needed to prevent exploitation

Technical summary

The Home Assistant Android Companion app, prior to version 2026.6.1, is vulnerable to an open redirect. This vulnerability allows an attacker to craft a malicious invite that could redirect users to a phishing page, potentially capturing their credentials. The app passes the URL fragment from a homeassistant://invite deep link into the onboarding flow without displaying the destination hostname, enabling attackers to create convincing phishing pages. Users and administrators should verify invite authenticity and update to version 2026.6.1 or later to mitigate this vulnerability.

Defensive priority

Medium

Recommended defensive actions

• Verify the authenticity of invites before connecting to Home Assistant servers
• Update the Android Companion app to version 2026.6.1 or later
• Monitor for suspicious activity and implement additional security measures to prevent phishing attacks
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details about the vulnerability, including its description, CVSS score, and affected versions. However, there is limited information about potential exploits or attacks.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.