CVE-2026-64825Home Assistant Core < 2026.6.0 Path Traversal File Write via Backup Upload
Updated under an hour ago ()
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It affects home-assistant Home Assistant Core. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 9.3 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L
- Weakness (CWE)
- CWE-22
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
home-assistant Home Assistant Core home_assistant:core (from the name) | before 2026.6.0 | CNA record |
References
- https://github.com/home-assistant/core/releases/tag/2026.6.0release-notes
- https://github.com/home-assistant/core/pull/172368issue-tracking
- https://github.com/home-assistant/core/commit/567fe858289876b68b8162a77bd46e1e1af79752patch
- https://www.vulncheck.com/advisories/home-assistant-core-path-traversal-file-write-via-backup-uploadthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.