{"id":"CVE-2026-64825","title":"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 o…","summary":"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 o…","severity":"critical","cvss":9.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L","cwe":["CWE-22"],"vendor":"home-assistant","product":"Home Assistant Core","affected":["home_assistant_core < 2026.6.0"],"patched":["homeassistant 2026.6.0"],"published":"2026-07-21","updated":"2026-10-08","sourceUpdated":"2026-10-08T16:17:28.357","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-64825","references":[{"url":"https://github.com/home-assistant/core/commit/567fe858289876b68b8162a77bd46e1e1af79752","label":"disclosure@vulncheck.com"},{"url":"https://github.com/home-assistant/core/pull/172368","label":"disclosure@vulncheck.com"},{"url":"https://github.com/home-assistant/core/releases/tag/2026.6.0","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/home-assistant-core-path-traversal-file-write-via-backup-upload","label":"disclosure@vulncheck.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64825"},{"url":"https://github.com/home-assistant/core"}],"tags":["nvd","cve.org","osv","pip"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-07-21T17:08:53.718755Z"},"epss":0.0058,"epssPercentile":0.47484,"aliases":["GHSA-5hxg-r395-fqxx"],"ecosystem":"pip","ingestedAt":"2026-08-14T19:18:45.388Z","slug":"CVE-2026-64825","body":"## Overview\n\nHome 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-64825)\n\nAffected packages:\n\n- `homeassistant < 2026.6.0`\n\nPatched in:\n\n- `homeassistant 2026.6.0`\n\nSource: https://osv.dev/vulnerability/GHSA-5hxg-r395-fqxx","depth":"midnight","depthScore":51,"depthScoreParts":{"impact":51.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}