Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.2.3, the IPP integration automatically processed unauthenticated _ipp._tcp.local mDNS announcements in homeassistant/components/ipp/config_flow.py, where async_step_zeroconf passed attacker-controlled host, port, and base_path values to validate_input for printer metadata retrieval. Because the shared HTTP client followed attacker-controlled cross-origin redirects without blocking loopback targets, a local-network attacker could redirect the request to 127.0.0.1 or another internal service without user interaction or prior IPP configuration. This issue is fixed in version 2026.2.3.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-4ghv-53cq-7wp3 Home Assistant: mDNS Server-Side Request Forgery
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Fri, 25 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 22 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
First Time appeared Home-assistant
Home-assistant core
Vendors & Products Home-assistant
Home-assistant core

Tue, 22 Sep 2026 19:15:00 +0000

Type Values Removed Values Added
Description Home Assistant is open source home automation software focused on local control and privacy. Prior to 2026.2.3, the IPP integration automatically processed unauthenticated _ipp._tcp.local mDNS announcements in homeassistant/components/ipp/config_flow.py, where async_step_zeroconf passed attacker-controlled host, port, and base_path values to validate_input for printer metadata retrieval. Because the shared HTTP client followed attacker-controlled cross-origin redirects without blocking loopback targets, a local-network attacker could redirect the request to 127.0.0.1 or another internal service without user interaction or prior IPP configuration. This issue is fixed in version 2026.2.3.
Title Home Assistant: mDNS Server-Side Request Forgery
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-09-24T15:25:00.416Z

Reserved: 2026-09-14T19:36:48.844Z

Link: CVE-2026-91129

cve-icon Vulnrichment

Updated: 2026-09-24T15:24:40.359Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-22T19:16:56.433

Modified: 2026-09-25T14:10:13.927

Link: CVE-2026-91129

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-22T21:45:06Z

Weaknesses