CVE-2026-64825
Home Assistant Core < 2026.6.0 Path Traversal File Write via Backup Upload
CVSS Score
9.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-22 |
| Vendor | home-assistant |
| Product | home assistant core |
| Published | Jul 21, 2026 |
| Last Updated | Jul 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
High
Availability
Low
Affected Versions
home-assistant / Home Assistant Core
0 < 2026.6.0
References
github.com: https://github.com/home-assistant/core/releases/tag/2026.6.0 github.com: https://github.com/home-assistant/core/pull/172368 github.com: https://github.com/home-assistant/core/commit/567fe858289876b68b8162a77bd46e1e1af79752 vulncheck.com: https://www.vulncheck.com/advisories/home-assistant-core-path-traversal-file-write-via-backup-upload
Credits
Harish Kolla (@Har1sh-k)