{"cve":"CVE-2026-64825","nvd":{"published":"2026-07-21T16:17:21.633","modified":"2026-10-24T19:10:00.127","status":"Deferred","description":"Home Assistant Core before 2026.6.0 contains a path traversal vulnerability that allows unauthenticated attackers to write arbitrary files to any directory on the host filesystem by uploading a crafted backup archive during the initial onboarding window. Attackers can manipulate the 'name' field inside the uploaded archive's backup.json to supply an absolute path, causing pathlib.Path.__truediv__ to discard the configured backup directory prefix and write attacker-controlled content to arbitrary locations, with full filesystem access when the process runs as root.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L","score":9.0},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L","score":9.3},"cwes":["CWE-22"],"references":["https://github.com/home-assistant/core/commit/567fe858289876b68b8162a77bd46e1e1af79752","https://github.com/home-assistant/core/pull/172368","https://github.com/home-assistant/core/releases/tag/2026.6.0","https://www.vulncheck.com/advisories/home-assistant-core-path-traversal-file-write-via-backup-upload"],"products":[],"source":"nvd","synced_at":"2026-10-25T17:50:08.599881581+00:00"},"epss":{"cve":"CVE-2026-64825","score":0.0058,"percentile":0.47395,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-5hxg-r395-fqxx","url":"https://osv.dev/vulnerability/GHSA-5hxg-r395-fqxx","summary":"Home Assistant Core vulnerable to Path Traversal via backup upload during onboarding","modified":"2026-08-19T12:55:43.937931247Z","packages":[{"ecosystem":"PyPI","name":"homeassistant","purl":"pkg:pypi/homeassistant","ranges":["<2026.6.0"],"fixed":["2026.6.0"]}]},{"id":"PYSEC-2026-3669","url":"https://osv.dev/vulnerability/PYSEC-2026-3669","summary":"Home Assistant Core vulnerable to Path Traversal via backup upload during onboarding","modified":"2026-08-19T12:45:06.492757705Z","packages":[{"ecosystem":"PyPI","name":"homeassistant","purl":"pkg:pypi/homeassistant","ranges":["<2026.6.0"],"fixed":["2026.6.0"]}]}],"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."]}