CVE-2019-19507: Validation bypass is possible in Json Pattern Validator

The CVE explicitly identifies compareCommon() as the vulnerable function where type validation occurs via constructor.name checks. The GitHub Issue #6 shows this check happening in validation logic (value.constructor.name comparison) which would be contained in compareCommon. The validate() function is the entry point that processes attacker-controlled JSON and triggers compareCommon, making both functions relevant for runtime detection. The vulnerability stems from trusting mutable constructor properties for type validation.