Fresh is a module used by the Express.js framework for HTTP response freshness testing. It is vulnerable to a regular expression denial of service when it is passed specially crafted input to parse. This causes the event loop to be blocked …

{
                    "product": "fresh node module",
                    "vendor": "HackerOne",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "< 0.5.2"
                        }
                    ]
                }