milvus HTTP Endpoint expr.go expr.Exec deserialization

A security vulnerability has been detected in milvus up to 2.6.7. This vulnerability affects the function expr.Exec of the file pkg/util/expr/expr.go of the component HTTP Endpoint. The manipulation of the argument code leads to deserialization. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. A fix is planned for the next release 2.6.8.