Critical severity9.3NVD Advisory· Published Jul 21, 2026· Updated Jul 21, 2026
CVE-2026-64825
CVE-2026-64825
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
homeassistantPyPI | < 2026.6.0 | 2026.6.0 |
Affected products
2- Range: < 2026.6.0
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-5hxg-r395-fqxxghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-64825ghsaADVISORY
- github.com/home-assistant/core/commit/567fe858289876b68b8162a77bd46e1e1af79752nvdWEB
- github.com/home-assistant/core/pull/172368nvdWEB
- github.com/home-assistant/core/releases/tag/2026.6.0nvdWEB
- www.vulncheck.com/advisories/home-assistant-core-path-traversal-file-write-via-backup-uploadnvdWEB
News mentions
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