We discovered two more JS Prototype Pollution vulnerabilities in one more nmp-package: CVE-2020-28449, CVE-2020-28450. The package has ~200 weekly downloads, so the popularity level is limited. However, due to the patch is still unavailable check the details and make sure that your Node.js app is not affected.
You can find more interesting vulnerabilities and techniques of its finding and exploitation in our Bug Hunting Hub channel.
About Prototype Pollution