    authHandler = function authHandler(authsLeft, partial, cb) {
      if (authPos === authsAllowed.length)
        return false;
      return authsAllowed[authPos++];
    };
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.