The debug module is vulnerable to regular expression denial of service when untrusted user input is passed into the o formatter. It takes around 50k characters to block for 2 seconds making this a low severity issue.
github.com/visionmedia/debug/issues/501
github.com/visionmedia/debug/pull/504
lists.apache.org/thread.html/r8ba4c628fba7181af58817d452119481adce4ba92e889c643e4c7dd3@%3Ccommits.netbeans.apache.org%3E
lists.apache.org/thread.html/rb5ac16fad337d1f3bb7079549f97d8166d0ef3082629417c39f12d63@%3Cnotifications.netbeans.apache.org%3E
nodesecurity.io/advisories/534