CVE-2023-41899: Partial Server-Side Request Forgery in Home Assistant Core

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-10-19 · updated 2026-06-17
Weakness: CWE-918

Description

Home assistant is an open source home automation. In affected versions the `hassio.addon_stdin` is vulnerable to a partial Server-Side Request Forgery where an attacker capable of calling this service (e.g.: through GHSA-h2jp-7grc-9xpp) may be able to invoke any Supervisor REST API endpoints with a POST request. An attacker able to exploit will be able to control the data dictionary, including its addon and input key/values. This issue has been addressed in version 2023.9.0 and all users are advised to upgrade. There are no known workarounds for this vulnerability. This issue is also tracked as GitHub Security Lab (GHSL) Vulnerability Report: `GHSL-2023-162`.

Affected products

Home-Assistant: before 2023.9.0 — fixed in 2023.9.0

How to fix

Upgrade to a fixed version: Home-Assistant 2023.9.0. Check the vendor advisory for mitigations.

References

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