Description
This affects the package npm-user-validate before 1.0.1. The regex that validates user emails took exponentially longer to process long input strings beginning with @ characters.
Remediation
References
https://github.com/npm/npm-user-validate/commit/c8a87dac1a4cc6988b5418f30411a8669bef204e
https://github.com/npm/npm-user-validate/security/advisories/GHSA-xgh6-85xh-479p
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1019353
https://snyk.io/vuln/SNYK-JS-NPMUSERVALIDATE-1019352
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