{"id":"CVE-2026-91129","published":"2026-09-22T19:16:56.433","lastModified":"2026-09-25T14:10:13.927","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.","cvssScore":5.4,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","cwes":["CWE-918"],"vendors":[],"products":[],"references":[{"url":"https://github.com/home-assistant/core/commit/0f3c7ca2772b605c0f3c09c88f35e527ea6ea560","tags":[]},{"url":"https://github.com/home-assistant/core/commit/815c708d19aa0c7f59f9ee318b613a5e481a42b3","tags":[]},{"url":"https://github.com/home-assistant/core/pull/162941","tags":[]},{"url":"https://github.com/home-assistant/core/releases/tag/2026.2.3","tags":[]},{"url":"https://github.com/home-assistant/core/security/advisories/GHSA-4ghv-53cq-7wp3","tags":[]},{"url":"https://github.com/home-assistant/core/security/advisories/GHSA-4ghv-53cq-7wp3","tags":[]}],"exploitRefs":[{"url":"https://github.com/home-assistant/core/commit/0f3c7ca2772b605c0f3c09c88f35e527ea6ea560","tags":[]},{"url":"https://github.com/home-assistant/core/commit/815c708d19aa0c7f59f9ee318b613a5e481a42b3","tags":[]},{"url":"https://github.com/home-assistant/core/pull/162941","tags":[]},{"url":"https://github.com/home-assistant/core/releases/tag/2026.2.3","tags":[]},{"url":"https://github.com/home-assistant/core/security/advisories/GHSA-4ghv-53cq-7wp3","tags":[]},{"url":"https://github.com/home-assistant/core/security/advisories/GHSA-4ghv-53cq-7wp3","tags":[]}],"hasPoc":true,"ai":null}