CVE-2026-64825

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 v3 9.3 CRITICAL

9.3^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact LOW

Scope CHANGED

References

Link	Resource
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

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-21 16:17

Updated : 2026-07-21 20:28

NVD link : CVE-2026-64825

Mitre link : CVE-2026-64825

CVE.ORG link : CVE-2026-64825

JSON object : View

Products Affected

No product.

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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