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Vulnerability record · CVE-2026-66061 · published 7 August 2026

CVE-2026-66061: Missing authorization vulnerability

Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.5.0, the iOS Companion app treats tag links (NFC or QR) delivered through an OS-level routing mechanism such as iOS universal links as if they were physically scanned, without validating the calling app or prompting the user. As a result, any untrusted app on the device can forward an arbitrary tag to Home Assistant, causing it to execute the associated automation as though a legitimate user had scanned an authorized tag. This allows silent, unattended automation execution by untrusted local callers. This issue has been fixed in version 2026.5.0.

7.1 CVSS 3.1 High EPSS 0.17% · top 94.7% CWE-862 · Missing authorization Deferred
7.1CVSS 3.1 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
9 Sep 2026Last modified by NVD

Description

Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.5.0, the iOS Companion app treats tag links (NFC or QR) delivered through an OS-level routing mechanism such as iOS universal links as if they were physically scanned, without validating the calling app or prompting the user. As a result, any untrusted app on the device can forward an arbitrary tag to Home Assistant, causing it to execute the associated automation as though a legitimate user had scanned an authorized tag. This allows silent, unattended automation execution by untrusted local callers. This issue has been fixed in version 2026.5.0.

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

References

LinkTags
https://github.com/home-assistant/core/security/advisories/GHSA-j23v-9672-677j
https://github.com/home-assistant/iOS/commit/45e05e6666c74fdbea44cc4d6fb103043fff6fd9
https://github.com/home-assistant/core/security/advisories/GHSA-j23v-9672-677j

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Source: NIST National Vulnerability Database (record CVE-2026-66061), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.