CVE-2026-91129
Home Assistant: mDNS Server-Side Request Forgery
MEDIUM 5.4EPSS 0.2%
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.
- Affected
- home-assistant · core
- CVSS v3.1 GITHUB
- 5.4 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - EPSS
- 0.20% chance of exploitation in the next 30 days, 10th percentile
- Published
- 2026-09-22
- Updated
- 2026-09-24