CVE-2026-64825

CRITICAL SEVERITY

CVSS Score & Metrics

Base Score

9.3 / 10

Vector String

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

Vulnerability 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.

Vulnerability Details

Published Date

July 21, 2026

Last Modified

July 21, 2026

CWE ID

CWE-22

Source

NVD

Vendor

home-assistant

Product

Home Assistant Core

External References

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

CVE-2026-64825

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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