---
cve: "CVE-2026-64825"
severity: "CRITICAL"
cvss: 9.0
epss: "48%"
vendor: "home-assistant"
kev: false
exploited: false
published: "2026-07-21 16:17:21"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-12T11:59:42+02:00"
---

# CVE-2026-64825

> 9.0 CRITICAL · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 836740c247b334d11df3058850878d061168dc57 (Commit)
- 567fe858289876b68b8162a77bd46e1e1af79752 (Commit)

## Referenzen

- <https://github.com/home-assistant/core/releases/tag/2026.6.0>
- <https://github.com/home-assistant/core/pull/172368>
- <https://github.com/home-assistant/core/commit/567fe858289876b68b8162a77bd46e1e1af79752>
- <https://www.vulncheck.com/advisories/home-assistant-core-path-traversal-file-write-via-backup-upload>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-64825) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_