CVE Catalog

CVE-2026-40602

MediumCVSS 5.6
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.10%

1th percentile - higher than 1% of all known CVEs

Summary

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.

Risk Assessment

A user could execute arbitrary Python code in the application context, potentially leading to full system compromise.

Recommendation

Update home-assistant-cli to version 1.0.0 or later.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS