CVE-2026-91130
Received Received - Intake

Statistics Graph Card XSS via Entity Name in Home Assistant

Publication date: 2026-09-22

Last updated on: 2026-09-22

Assigner: GitHub, Inc.

Description
Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.7.0, the Statistics Graph card in src/components/chart/statistics-chart.ts passed entity names through getStatisticLabel and computeStateName and interpolated param.seriesName into ECharts tooltip HTML without escaping. An authenticated user or an integration that supplies a malicious default entity name could cause script-related HTML to execute when a viewer hovered over a data point. Mean, State, Sum, and Change fields in the default Line chart configuration were affected, while Bar charts were not. This issue is fixed in version 2026.7.0.

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Meta Information

Published
2026-09-22
Last Modified
2026-09-22
Generated
2026-09-23
AI Q&A
2026-09-22
EPSS Evaluated
N/A
NVD
CVE-2026-91130
EUVD
EUVD-2026-84803

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
home_assistant home_assistant 2026.7.0
home_assistant home_assistant to 2026.7.0 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-80 The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages.

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Executive Summary

CVE-2026-91130 is a Cross-Site Scripting (XSS) vulnerability in Home Assistant's Statistics Graph card. It occurs because entity names are interpolated into HTML tooltips without proper escaping. An attacker with access or through a malicious integration could inject script code via entity names, which executes when users hover over data points in the card.

Detection Guidance

Check Home Assistant version with command: grep -E 'homeassistant|version' /config/configuration.yaml or check via UI under Settings > About. If version is below 2026.7.0, the system is vulnerable. Inspect Statistics Graph card tooltips for unexpected HTML rendering when hovering over data points.

Impact Analysis

This vulnerability allows attackers to execute malicious scripts in the context of a user's browser session. This could lead to theft of session cookies, account takeover, or unauthorized actions on behalf of the user. It affects anyone viewing a vulnerable Statistics Graph card with malicious entity names.

Compliance Impact

This XSS vulnerability could lead to unauthorized access to personal data, violating GDPR's integrity and confidentiality principles. For HIPAA, it may compromise protected health information integrity. Organizations using Home Assistant may face compliance violations if exploited, potentially resulting in fines or legal consequences.

Mitigation Strategies

Upgrade Home Assistant to version 2026.7.0 or later immediately. Review and sanitize all entity names, device names, and node labels to remove any HTML or script content. Remove any Statistics Graph cards from dashboards until updated.

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