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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin privileges needed
User Interaction
Active
User action required
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 5
https://github.com/home-assistant/core/commit/1e457600f1093c15e1325742d03e2b764…
disclosure@vulncheck.com
https://github.com/home-assistant/core/pull/172252
disclosure@vulncheck.com
https://github.com/home-assistant/core/releases/tag/2026.7.0
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/home-assistant-core-symlink-path-traversal…
disclosure@vulncheck.com
https://github.com/MervinPraison/PraisonAI/security/advisories/GHSA-78r8-wwqv-r…
134c704f-9b21-4f2e-91b3-4a467353bcc0