CVE-2026-64825

CriticalCVSS 9.3/10Last modified Oct 24, 2026

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.

Metrics

CVSS 3.1 9.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L

Weakness enumeration

CWE-22

Affected software

No affected versions have been published.

Timeline

Published: Jul 21, 2026
Last modified: Oct 24, 2026
NVD status: Deferred

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