Is CVE-2026-40602 actively exploited?

No active exploitation of CVE-2026-40602 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40602 be exploited remotely?

No. CVE-2026-40602 requires local access to exploit.

What is the CVSS score of CVE-2026-40602?

CVE-2026-40602 has a CVSS score of 5.6 (MEDIUM).

HOME VULNERABILITIESCVE-2026-40602

MEDIUM

CVE-2026-40602

CWE-94Published: April 21, 2026· Updated: Apr 27, 2026

5.6

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:4.5th

Official 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.

NVD Source

Technical Analysis

CVE-2026-40602 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 5.6.