🛡️ CVE-2026-44470
🟠 CVSS 7.8 — High ✅ No Known Exploit CWE-59 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity HIGH
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-59
Public Exploit ✅ No
Source NVD
Published 2026-05-13
Updated 2026-06-03
Modified 2026-06-02
Fix URL N/A

Affected Packages

Software From version Fixed in
claude-desktop — 1.3834.0
unknown — —

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