class-transformer before 0.3.1 allow attackers to perform Prototype Pollution. The classToPlainFromExist function could be tricked into adding or modifying properties of Object.prototype using a proto payload.
{ "versions": [ { "introduced": "0" }, { "fixed": "0.3.1" } ] }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-7637.json"