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Home Assistant Core EUVDEUVD-2026-46300

| CVE-2026-64824 CRITICAL
Path Traversal (CWE-22)
2026-07-21 VulnCheck GHSA-cwh8-w64c-4j5h
RCE Python Docker Path Traversal Home Assistant Core
9.3
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
9.3 CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
vuln.today AI
8.4 HIGH

Restore requires authenticated admin (PR:H) and a restore action (UI:R); root-level write outside the app boundary is a scope change (S:C) yielding full C/I/A impact.

3.1 AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
A
Scope
X

Lifecycle Timeline

3
Source Code Evidence Fetched
Jul 21, 2026 - 16:24 vuln.today
Analysis Generated
Jul 21, 2026 - 16:24 vuln.today
CVE Published
Jul 21, 2026 - 15:39 cve.org
CRITICAL 9.3

DescriptionCVE.org

Home Assistant Core before 2026.6.0 contains a path traversal vulnerability in the backup-restore function that allows attackers to write files to arbitrary absolute filesystem paths by supplying a crafted tar archive with a SYMTYPE entry containing a benign member name paired with an absolute linkname pointing outside the extraction directory. Because the official Docker image runs the Home Assistant process as root and the subsequent regular-file entry is written through the unvalidated symlink, attackers can achieve remote code execution by overwriting auto-imported Python paths such as site-packages/sitecustomize.py or custom component directories.

Articles & Coverage 2

News 4 New Docker Vulnerabilities - 1 Critical, 3 High Severity Jul 22, 2026 News Critical Path Traversal RCE in Home Assistant Core - CVE-2026-64824 Jul 21, 2026

AnalysisAI

Path-traversal to remote code execution in Home Assistant Core before 2026.6.0 lets an authenticated user who can supply a backup archive overwrite arbitrary files on the host. The backup-restore routine trusts a tar SYMTYPE (symlink) entry whose linkname is an absolute path outside the extraction directory, then writes a following regular-file entry through that unvalidated symlink; because the official Docker image runs the process as root, an attacker can drop code into auto-imported Python paths (e.g. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain restore-capable admin access or social-engineer an admin
Delivery
Deliver crafted backup tar with absolute-linkname symlink entry
Exploit
Trigger backup-restore to write file through symlink outside extraction dir
Execution
Overwrite auto-imported Python path (sitecustomize.py) as root
Persist
Interpreter loads payload, execute code
Impact
Full host compromise / persistence
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Vulnerability AssessmentAI

Exploitation Exploitation requires an attacker-supplied backup tar archive to be processed by the Home Assistant Core backup-restore function - specifically a tar entry of type SYMTYPE (symlink) whose linkname is an absolute path outside the extraction directory, immediately followed by a regular-file entry that gets written through that symlink. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The vendor CVSS 4.0 score is 9.3 (Critical) with vector AV:N/AC:L/AT:N/PR:H/UI:A, and the impact metrics are maximal (VC/VI/VA:H and subsequent-system SC/SI/SA:H reflecting root-level host compromise). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with admin access to a Home Assistant instance (or who tricks an administrator into restoring a supplied backup) crafts a malicious backup tar containing an absolute-linkname symlink entry plus a follow-up file entry targeting site-packages/sitecustomize.py. When the backup is restored, the payload file is written through the symlink outside the extraction directory as root, and the attacker's Python code executes at the next interpreter startup, yielding full host code execution. …
Remediation Vendor-released patch: upgrade to Home Assistant Core 2026.6.0 or later, which corrects the backup-restore symlink handling (fix commit 1e457600f1093c15e1325742d03e2b76498c79c1, PR 172252). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: identify all Home Assistant Core instances in production and catalog running versions by accessing the Settings > About page in each deployment. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-46300 vulnerability details – vuln.today
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