GHSA-27v5-c462-wpq7 path-to-regexp vulnerable to Regular Expression Denial of Service via multiple wildcards

• npm path-to-regexp: >= 8.0.0, < 8.4.0 → fixed in 8.4.0

Impact When using multiple wildcards, combined with at least one parameter, a regular expression can be generated that is vulnerable to ReDoS. This backtracking vulnerability requires the second wildcard to be somewhere other than the end of the path. Unsafe examples: ``` /*foo-*bar-:baz /*a-:b-*c-:d /x/*a-:b/*c/y ``` Safe examples: ``` /*foo-:bar /*foo-:bar-*baz ``` Patches Upgrade to version `8.4.0`. Workarounds If developers are using multiple wildcard parameters, they can check the regex output with a tool such as https://makenowjust-labs.github.io/recheck/playground/ to confirm whether a path is vulnerable.