CVE-2026-44698

HIGH EPSS 3.4%
Published May 29, 20261mo ago · Modified Jun 17, 20262w ago
8.3 CVSS 3.1
High
Find Similar
Published May 29, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

Description

Home Assistant is open source home automation software that puts local control and privacy first. Prior to 2026.4.1 for iOS and 2026.4.4 for Android, he Home Assistant Companion apps for Android and iOS expose a JavaScript bridge to the in-app WebView window.externalApp on Android and webkit.messageHandlers.getExternalAuth (alongside revokeExternalAuth and externalBus) on iOS. Two flaws expose the bridge to all frames (including cross-origin iframes) and unsanitized interpolation of the JavaScript callback identifier allows a cross-origin iframe rendered inside the Companion app to execute arbitrary JavaScript in the Home Assistant frontend's main-frame origin and exfiltrate the signed-in user's access token. This vulnerability is fixed in 2026.4.1 for iOS and 2026.4.4 for Android.

CVSS Details

Base Score
8.3
Exploitability
1.6
Impact
6.0
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
3.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 4

CWE-346
CWE-749
CWE-94 Improper Control of Generation of Code (Code Injection) Injection
CWE-940

References 1

  • github.com https://github.com/home-assistant/core/security/advisories/GHSA-7jp2-p2fw-mgvf

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.