The package grpc before 1.24.4; the package @grpc/grpc-js before 1.1.8 are vulnerable to Prototype Pollution via loadPackageDefinition.
https://snyk.io/vuln/SNYK-JS-GRPCGRPCJS-1038818
https://snyk.io/vuln/SNYK-JS-GRPC-598671
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1038819