CVE-2026-64825

PUBLISHED

Published: 21 Jul 2026, 15:40

Last modified:21 Jul 2026, 17:15

Vulnerability Summary

Overall Risk (default)

high

70/100

CVSS Score

9.3 CRITICAL

v3.1 (cve.org)

EPSS Score

No data

KEV

Not listed

Ransomware

No reports

Public exploits

None found

Dark Web

Not detected

Timeline

21 Jul 2026, 15:40

Published

Vulnerability first disclosed

21 Jul 2026, 17:15

Last Modified

Vulnerability information updated

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.

CVSS Metrics

v4.0•CRITICAL•Score: 9CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L
v3.1•CRITICAL•Score: 9.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L

Techniques & Countermeasures

CWE-22•Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Affected Systems

home-assistant•home assistant core
< 2026.6.0