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Home Assistant Core < 2026.6.0 Path Traversal File Write via Backup Upload

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-64825

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-64825

Home Assistant Core

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://github.com/home-assistant/core",
    "vendor": "home-assistant",
    "product": "Home Assistant Core",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "2026.6.0",
        "versionType": "semver"
      }
    ],
    "packageURL": "pkg:pypi/homeassistant",
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-64825

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#12790 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement