CVE-2026-64825 json
Home Assistant Core < 2026.6.0 Path Traversal File Write via Backup Upload
published 3mo ago modified 3d ago also EUVD-2026-46301 , GHSA-5hxg-r395-fqxx , PYSEC-2026-3669
- cvss
- 9.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
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.
Patch / fix
- pypi homeassistant 2026.6.0
- home-assistant Home Assistant Core 2026.6.0
Is CVE-2026-64825 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 3mo ago
Exploit prediction
0.58% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.0 | 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 |
| CNA | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L |
| GitHub | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L |
| CNA | 4.0 | 9.0 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| OSV | 3.1 | 9.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | homeassistant | <2026.6.0 |
2026.6.0 |
Affected products
- home-assistant Home Assistant Core
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/home-assistant/core/pull/172368
issue-tracking, patch, web
-
github.com
/home-assistant/core/commit/567fe858289876b68b8162a77bd46e1e1af79752
patch, web
-
github.com
/home-assistant/core/releases/tag/2026.6.0
release-notes, web
-
vulncheck.com
/advisories/home-assistant-core-path-traversal-file-write-via-backup-upload
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-64825
advisory
-
github.com
/home-assistant/core
package
-
pypi.org
/project/homeassistant
package
-
github.com
/advisories/GHSA-5hxg-r395-fqxx
advisory
Sources
- CVE List CVE-2026-64825
- GitHub Advisory GHSA-5hxg-r395-fqxx
- NVD CVE-2026-64825
- OSV PYSEC-2026-3669
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.