SB2026050756 - Privilege escalation in Claude Desktop

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Main Vulnerability Database SB2026050756

SB2026050756 - Privilege escalation in Claude Desktop

Published: May 7, 2026

Security Bulletin ID SB2026050756
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Link following (CVE-ID: CVE-2026-44470)

CWE-ID: CWE-59 - Improper Link Resolution Before File Access ('Link Following')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to improper link resolution before file access in CoworkVMService when creating files within the VM bundle directory. A local user can replace the user-writable VM bundle directory with a directory junction pointing to an attacker-chosen location to escalate privileges.

The issue affects Claude Desktop for Windows because the service runs as SYSTEM and may create a SYSTEM-owned file in an arbitrary directory.


Remediation

Install update from vendor's website.

References