mcp-path-validation-wind-filesystem-mcp-server-rejects-paths-with-lowercase-aeed7496

THEN Normalize paths by converting drive letters to uppercase before comparison during path validation. Implement a case-insensitive comparison for drive letters on Windows systems to ensure both 'g:\' and 'G:\' are treated as equivalent.

// TypeScript: normalize drive letter before validation
function normalizeWindowsPath(path: string): string {
  return path.replace(/^([a-z]):/i, (match) => match.toUpperCase());
}
// Use normalized path in allowlist checks