CVE-2026-64825

Home Assistant Core vulnerable to Path Traversal via backup upload during onboarding

Published 21 Jul 2026Modified 24 Oct 2026CWE 22

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

GHSA9.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L

Trivy's own label is CRITICAL. Rated critical by GHSA.

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.

Affected packages and fixed versions

Source	Package	Fixed in
pip::GitHub Security Advisory pip	homeassistant	2026.6.0

References

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