VulnerabilityPublished 12 Aug 2026

ZDI-26-561: (Pwn2Own) Home Assistant Green go2rtc Command Injection Remote Code Execution Vulnerability

Source Zero Day Initiative

Fixed in 1.9.14 : patch affected systems soon.

Data as of 21 Aug 2026, 17:34 UTC

Severity

High

Rated High by Zero Day Initiative

Patch: Available – fixed in 1.9.14

What to do

AI-suggested

A fix is available. Users should update to go2rtc version 1.9.14 and the corresponding patched version of Home Assistant Green as indicated in the vendor advisory. Applying these updates will remediate the vulnerability.

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Home Assistant Green. An attacker must first obtain the ability to access the device's localhost interface. The ZDI has assigned a CVSS rating of 7.5.

Impact

An attacker who can access the device's localhost interface can execute arbitrary code as root, potentially leading to full system compromise, including confidentiality, integrity, and availability impacts.

Summary

The vulnerability in Home Assistant Green involves the go2rtc process improperly validating user-supplied strings before using them in system calls, enabling command injection. An attacker must have network adjacency and access to the localhost interface of the device to exploit this flaw. Successful exploitation allows arbitrary code execution with root privileges. The issue was reported on 2025-11-05 and publicly disclosed on 2026-08-12. The fix is available in go2rtc version 1.9.14 and the updated Home Assistant Green release.

References

zerodayinitiative.com/advisories/ZDI-26-561/ (opens in a new tab)

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Description

AI analysisMachine-generated, updated 12 Aug 2026, 20:10 UTC

References

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