CVE intelligence and bounded remediation

CVE-2026-33045 — Home Assistant is open source home automation software that puts local control and privacy first

High CVSS 7.3

Home Assistant is open source home automation software that puts local control and privacy first. Starting in version 2025.02 and prior to version 2026.01 the "remaining charge time"-sensor for mobile phones (imported/included from Android Auto it appears) is vulnerable cross-site scripting, similar to CVE-2025-62172. Version 2026.01 fixes the issue.

Severity
High
CVSS
7.3 (4.0)
Published
2026-03-27
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-79

Affected products

  • home-assistant / home-assistant

Matched remediation archetype

Cross-site scripting and unsafe browser output

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace reflected, stored, and DOM-derived untrusted values into HTML, attributes, URLs, styles, scripts, and client-side template sinks.
  • Identify affected origins, authenticated user roles, sensitive browser capabilities, and where content is shared across tenants.
  • Review framework escaping, rich-text sanitization, legacy templates, and client-side rendering paths.

Remediate safely

  • Use context-aware framework output encoding and safe DOM APIs; keep untrusted data out of executable contexts.
  • Sanitize intentionally supported markup with a maintained allowlist policy and validate URLs and attributes separately.
  • Update affected rendering components and add tests for every output context using inert sentinel markup.

Authoritative sources

Complete CVE record and remediation plan

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