VulnerabilityPublished 12 Aug 2026

ZDI-26-563: (Pwn2Own) Home Assistant Green Simple Service Discovery Protocol Server-Side Request Forgery Vulnerability

Source Zero Day Initiative

Severity

Medium

Rated Medium by Zero Day Initiative

Data as of 21 Aug 2026, 17:34 UTC

What to do

AI-suggested

Home Assistant has released an official update that addresses this vulnerability. Users should apply the update promptly to mitigate the risk. No additional mitigation steps are indicated in the advisory.

Description

This vulnerability allows network-adjacent attackers to initiate arbitrary server-side requests on affected installations of Home Assistant Green. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 5.4.

Impact

An attacker within the network can exploit this vulnerability to make arbitrary server-side requests on the affected Home Assistant Green installation. This can lead to information disclosure and potentially allow execution of arbitrary code with root privileges if combined with other vulnerabilities. The vulnerability does not require authentication, increasing its risk in exposed network environments.

Summary

The vulnerability in Home Assistant Green involves improper validation of SSDP headers, enabling network-adjacent attackers to perform server-side request forgery (SSRF) attacks. Exploitation does not require authentication. Attackers can leverage this flaw to initiate arbitrary server-side requests, potentially chaining with other vulnerabilities to execute arbitrary code with root privileges. The issue was reported to the vendor in November 2025 and publicly disclosed in August 2026. Home Assistant has issued a patch to correct this vulnerability.

References

zerodayinitiative.com/advisories/ZDI-26-563/ (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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