Rule Definition
JSON.parse and JSON.stringify methods are used to analyse JSON data. Since JSON data often comes from external sources (such as from a web service callback), there is a risk that this data is poorly formatted which would lead to an error and unexpected behavior unless the JSON.parse and JSON.stringify are within a try/catch block handling the error.

Remediation
Always use JSON.parse in try/catch block

Violation Code Sample

function readJSON(filePath, callback) {

  fs.readFile(filePath, (err, data) => {

    var parsedJson;

    // Handle error
    if (err) {
      return callback(err);
    }

    // Parse JSON
    parsedJson = JSON.parse(data);

    return (parsedJson !== 'undefined');
  });
}

Fixed Code Sample

function readJSON(filePath, callback) {

  fs.readFile(filePath, (err, data) => {

    var parsedJson;

    // Handle error
    if (err) {
      return callback(err);
    }

    // Parse JSON
    try {
      parsedJson = JSON.parse(data);
    } catch (exception) {
      return callback(exception);
    }

    // Everything is ok
    return callback(null, parsedJson);
  });
}

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/JSON_bad_parse