The timespan module is vulnerable to regular expression denial of service. Given 50k characters of untrusted user input it will block the event loop for around 10 seconds.
https://nodesecurity.io/advisories/533
https://github.com/indexzero/TimeSpan.js/issues/10
Source: Mitre, NVD
Published: 2018-06-07
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Severity: Medium
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity: High