CVE-2026-40602
5.6 · MEDIUMOverview
CVE-2026-40602 is a medium-severity vulnerability affecting home-assistant-ecosystem home_assistant_command-line_interface. It was published on April 21, 2026 and has a CVSS 3.1 base score of 5.6 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.6, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
The Home Assistant Command-line interface (hass-cli) is a command-line tool for Home Assistant. Up to 1.0.0 of home-assitant-cli an unrestricted environment was used to handle Jninja2 templates instead of a sandboxed one. The user-supplied input within Jinja2 templates was rendered locally with no restrictions. This gave users access to Python's internals and extended the scope of templating beyond the intended usage. This vulnerability is fixed in 1.0.0.
Remediation
Check the references section for vendor advisories and patches from home-assistant-ecosystem. Update home_assistant_command-line_interface to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| home-assistant-ecosystem | home_assistant_command-line_interface | >= 0, < 1.0.0 | Affected |
Frequently Asked Questions
What is CVE-2026-40602?
CVE-2026-40602 is a medium-severity vulnerability affecting home-assistant-ecosystem home_assistant_command-line_interface. It was published on April 21, 2026 and has a CVSS 3.1 base score of 5.6 (MEDIUM).
How severe is CVE-2026-40602?
This vulnerability has a CVSS 3.1 base score of 5.6, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-40602?
Check the references section for vendor advisories and patches from home-assistant-ecosystem. Update home_assistant_command-line_interface to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-40602?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-40602 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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