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.
History

Wed, 22 Apr 2026 00:00:00 +0000

Type Values Removed Values Added
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.
Title hass-cli: Handling of user-supplied Jinja2 templates
Weaknesses CWE-1336
CWE-94
References
Metrics cvssV3_1

{'score': 5.6, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-04-21T19:02:03.968Z

Reserved: 2026-04-14T14:07:59.641Z

Link: CVE-2026-40602

cve-icon Vulnrichment

Updated: 2026-04-21T19:01:58.525Z

cve-icon NVD

Status : Received

Published: 2026-04-21T18:16:51.827

Modified: 2026-04-21T18:16:51.827

Link: CVE-2026-40602

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.