{"cve":"CVE-2026-91129","nvd":{"published":"2026-09-22T19:16:56.433","modified":"2026-09-25T14:10:13.927","status":"Awaiting Analysis","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","score":5.4},"cwes":["CWE-918"],"references":["https://github.com/home-assistant/core/commit/0f3c7ca2772b605c0f3c09c88f35e527ea6ea560","https://github.com/home-assistant/core/commit/815c708d19aa0c7f59f9ee318b613a5e481a42b3","https://github.com/home-assistant/core/pull/162941","https://github.com/home-assistant/core/releases/tag/2026.2.3","https://github.com/home-assistant/core/security/advisories/GHSA-4ghv-53cq-7wp3"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:56:02.509636177+00:00"},"epss":{"cve":"CVE-2026-91129","score":0.00294,"percentile":0.22069,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-4ghv-53cq-7wp3","url":"https://osv.dev/vulnerability/GHSA-4ghv-53cq-7wp3","summary":"Home Assistant: mDNS Server-Side Request Forgery","modified":"2026-10-01T17:56:22.468929375Z","packages":[{"ecosystem":"PyPI","name":"homeassistant","purl":"pkg:pypi/homeassistant","ranges":["<2026.2.3"],"fixed":["2026.2.3"]}]},{"id":"PYSEC-2026-4051","url":"https://osv.dev/vulnerability/PYSEC-2026-4051","summary":"Home Assistant: mDNS Server-Side Request Forgery","modified":"2026-10-01T17:45:05.578147715Z","packages":[{"ecosystem":"PyPI","name":"homeassistant","purl":"pkg:pypi/homeassistant","ranges":["<2026.2.3"],"fixed":["2026.2.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}