CVE-2026-64825 (GCVE-0-2026-64825)
Vulnerability from cvelistv5 – Published: 2026-07-21 15:40 – Updated: 2026-10-08 15:23 X_Open Source
VLAI
EPSS
VEX
Title
Home Assistant Core < 2026.6.0 Path Traversal File Write via Backup Upload
Summary
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.
Severity
9.3 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-21 17:08 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/home-assistant/core/releases/t… | release-notes |
| https://github.com/home-assistant/core/pull/172368 | issue-tracking |
| https://github.com/home-assistant/core/commit/567… | patch |
| https://www.vulncheck.com/advisories/home-assista… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| home-assistant | Home Assistant Core |
Affected:
0 , < 2026.6.0
(semver)
cpe:2.3:a:home-assistant:home-assistant:*:*:*:*:*:*:*:* |
Date Public
2026-05-27 00:00
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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