Language: TypeScript
Label: safe
CWE: CWE-150 \u2014 Improper Neutralization of Escape, Meta, or Control Sequences
The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as escape, meta, or control character sequences when they are sent to a downstream component.

Code:
export function resolveExecutable(
  { env, executable },
  { exists, readlink, which },
) {
  try {
    executable = which(executable, { path: env.PATH || env.Path });
  } catch (_) {
    // For backwards compatibility return the executable even if its location
    // cannot be obtained
    return executable;
  }

  if (!exists(executable)) {
    // For backwards compatibility return the executable even if there exists no
    // file at the specified path
    return executable;
  }

  try {
    executable = readlink(executable);
  } catch (_) {
    // An error will be thrown if the executable is not a (sym)link, this is not
    // a problem so the error is ignored
  }

  return executable;
}