CVE-2021-21290: Creation of Temporary File With Insecure Permissions

Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers. There is a vulnerability on Unix-like systems involving an insecure temp file. When netty’s multipart decoders are used local information disclosure can occur via the local system temporary directory if temporary storing uploads on the disk is enabled.