CVE-2026-64825
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.
How to fix
- homeassistant2026.6.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| homeassistantPyPI | v < 2026.6.0 | 2026.6.0 |
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Attack Surface Management
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