All versions of utils-extend are vulnerable to prototype pollution. The extend function does not restrict the modification of an Object's prototype, which may allow an attacker to add or modify an existing property that will exist on all objects.

Recommendation

No fix is currently available. Consider using an alternative package until a fix is made available.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-8147
• https://hackerone.com/reports/801522
• https://www.npmjs.com/advisories/1502