Vulnerability Description
The Claude Desktop app gives you Claude Code with a graphical interface built for running multiple sessions side by side. Prior to 1.3834.0, the CoworkVMService component in Claude Desktop for Windows ran as SYSTEM and did not validate whether the VM bundle directory was a real directory or an NTFS directory junction before creating files within it. A local non-elevated user could replace the user-writable VM bundle directory with a directory junction pointing to an attacker-chosen location, causing the service to create a SYSTEM-owned file in an arbitrary directory. This could be leveraged for local privilege escalation. This vulnerability is fixed in 1.3834.0.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-44470?
CVE-2026-44470 is a documented vulnerability. The Claude Desktop app gives you Claude Code with a graphical interface built for running multiple sessions side by side. Prior to 1.3834.0, the CoworkVMService component in Claude Desktop for Windows...
How severe is CVE-2026-44470?
CVSS scoring is not yet available for CVE-2026-44470. Check NVD for updates.
Is there a patch for CVE-2026-44470?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.