CVE-2026-35603
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.
How to fix
- anthropic claude_code2.1.75 or later
- @anthropic-ai/claude-code2.1.75 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| anthropic claude_code | v < 2.1.75 | 2.1.75 |
| @anthropic-ai/claude-codenpm | v < 2.1.75 | 2.1.75 |
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