Vulnerability-Lookup

GHSA-5HXG-R395-FQXX

Vulnerability from github – Published: 2026-07-21 18:31 – Updated: 2026-07-21 18:31

Details

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)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L

9.0 (Critical)


                  
                    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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64825"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-21T16:17:21Z",
    "severity": "CRITICAL"
  },
  "details": "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 \u0027name\u0027 field inside the uploaded archive\u0027s 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.",
  "id": "GHSA-5hxg-r395-fqxx",
  "modified": "2026-07-21T18:31:02Z",
  "published": "2026-07-21T18:31:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64825"
    },
    {
      "type": "WEB",
      "url": "https://github.com/home-assistant/core/pull/172368"
    },
    {
      "type": "WEB",
      "url": "https://github.com/home-assistant/core/commit/567fe858289876b68b8162a77bd46e1e1af79752"
    },
    {
      "type": "WEB",
      "url": "https://github.com/home-assistant/core/releases/tag/2026.6.0"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/home-assistant-core-path-traversal-file-write-via-backup-upload"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-64825 (GCVE-0-2026-64825)

Vulnerability from cvelistv5 – Published: 2026-07-21 15:40 – Updated: 2026-07-28 01:06 X_Open Source

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 (Critical)


                        
                          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

9.3 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

VulnCheck

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
home-assistant	Home Assistant Core	Affected: 0 , < 2026.6.0 (semver)

Date Public

2026-05-27 00:00

Credits

Harish Kolla (@Har1sh-k)

Show details on NVD website

JSON

To clipboard

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                  },
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-5HXG-R395-FQXX

CVE-2026-64825 (GCVE-0-2026-64825)

Tags

Sightings

Nomenclature