CVE-2026-35603 Details
Description
Claude Code is an agentic coding tool. In versions prior to 2.1.75 on Windows, Claude Code loaded the system-wide default configuration from C:\ProgramData\ClaudeCode\managed-settings.json without validating directory ownership or access permissions. Because the ProgramData directory is writable by non-administrative users by default and the ClaudeCode subdirectory was not pre-created or access-restricted, a low-privileged local user could create this directory and place a malicious configuration file that would be automatically loaded for any user launching Claude Code on the same machine. Exploiting this would have required a shared multi-user Windows system and a victim user to launch Claude Code after the malicious configuration was placed. This issue has been fixed on version 2.1.75.
A vulnerability in Claude Code on Windows has been identified, where the application loads system-wide default configurations from a user-writable directory without proper validation of directory ownership or access permissions. This issue affects versions prior to 2.1.75. The vulnerability allows low-privileged local users to create a malicious configuration file that could be loaded by any user running Claude Code on the same machine. Exploitation would require a shared multi-user Windows environment and for the victim user to launch Claude Code after the malicious file has been placed.
Users on the standard Claude Code auto-update have already received the fix. Those performing manual updates should update to the latest version.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 20, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/anthropics/claude-code/security/advisories/GHSA-5cwg-9f6j-9jvx | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-426 | Untrusted Search Path | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| anthropic claude code | < 2.1.75 |
CPE
Remediation
| |
| microsoft windows | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 22, 2026 | Initial Analysis | [email protected] |
| Apr 17, 2026 | New CVE Received | [email protected] |