Language: JavaScript
Label: safe
CWE: CWE-1321 \u2014 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.

Code:
function buildAttributesMap(attrStr, jPath) {
  if (!this.options.ignoreAttributes && typeof attrStr === 'string') {
    // attrStr = attrStr.replace(/\r?\n/g, ' ');
    //attrStr = attrStr || attrStr.trim();

    const matches = util.getAllMatches(attrStr, attrsRegx);
    const len = matches.length; //don't make it inline
    const attrs = {};
    for (let i = 0; i < len; i++) {
      const attrName = this.resolveNameSpace(matches[i][1]);
      let oldVal = matches[i][4];
      let aName = this.options.attributeNamePrefix + attrName;
      if (attrName.length) {
        if (this.options.transformAttributeName) {
          aName = this.options.transformAttributeName(aName);
        }
        if(aName === "__proto__") aName  = "#__proto__";
        if (oldVal !== undefined) {
          if (this.options.trimValues) {
            oldVal = oldVal.trim();
          }
          oldVal = this.replaceEntitiesValue(oldVal);
          const newVal = this.options.attributeValueProcessor(attrName, oldVal, jPath);
          if(newVal === null || newVal === undefined){
            //don't parse
            attrs[aName] = oldVal;
          }else if(typeof newVal !== typeof oldVal || newVal !== oldVal){
            //overwrite
            attrs[aName] = newVal;
          }else{
            //parse
            attrs[aName] = parseValue(
              oldVal,
              this.options.parseAttributeValue,
              this.options.numberParseOptions
            );
          }
        } else if (this.options.allowBooleanAttributes) {
          attrs[aName] = true;
        }
      }
    }
    if (!Object.keys(attrs).length) {
      return;
    }
    if (this.options.attributesGroupName) {
      const attrCollection = {};
      attrCollection[this.options.attributesGroupName] = attrs;
      return attrCollection;
    }
    return attrs;
  }
}