If you are using Apache Flink, it is better to check your system if any vulnerability exists.
Apache Flink is an open-source stream processing framework.
There is a REST handler allows to change uploaded file since Apache Flink 1.5.1. Attackers can modify HTTP Headers and acces to local file systems.
It is suggested to update your Apache Flink framework to version 1.11.3 or 1.12.0.