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CVE-2026-64824

CriticalPublished

Home Assistant Core < 2026.7.0 Symlink Path Traversal RCE via backup-restore

Published: Jul 21, 2026
Updated: Jul 28, 2026
Assigning CNA: VulnCheck
Evidence observed: Aug 10, 2026

Primary CVSS

9.3/ 10Critical

nvd · CVSS 4.0

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

EPSS probability estimate

0.8%

Low · next 30 days

Percentile: 54.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Home Assistant Core before 2026.7.0 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.

Sources

CVE-2026-64824-PoCExploit
CVE-2026-64824 — Home Assistant backup-restore symlink path traversal → root RCE. First working PoC, verified on real HA 2026.5.4 (sitecustomize.py overwrite). GHSA-cwh8-w64c-4j5h

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