Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| home-assistant / Home Assistant Core | affected 0 before 2026.6.0 |
CWE
CWE-22
References
- https://github.com/home-assistant/core/releases/tag/2026.6.0
- https://github.com/home-assistant/core/pull/172368
- https://github.com/home-assistant/core/commit/567fe858289876b68b8162a77bd46e1e1af79752
- https://www.vulncheck.com/advisories/home-assistant-core-path-traversal-file-write-via-backup-upload
ADP enrichment
No English description supplied.
No references supplied.