GHSA-5hxg-r395-fqxx
Home Assistant Core vulnerable to Path Traversal via backup upload during onboarding
At a glance
- Published
- Updated
- CVE
- CVE-2026-64825
- Aliases
- PYSEC-2026-3669
- CVSS_V3
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L
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
| Package | Versions |
|---|---|
| PyPI · homeassistant | introduced 0, fixed 2026.6.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-64825 ADVISORY
- https://github.com/home-assistant/core/pull/172368 WEB
- https://github.com/home-assistant/core/commit/567fe858289876b68b8162a77bd46e1e1af79752 WEB
- https://github.com/home-assistant/core PACKAGE
- https://github.com/home-assistant/core/releases/tag/2026.6.0 WEB
- https://www.vulncheck.com/advisories/home-assistant-core-path-traversal-file-write-via-backup-upload WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |