Use containerization and sandboxing tools to restrict the web server's ability to view sensitive paths in the virtual filesystem.
In the case of file:///proc/self/environ , it's likely being used as a callback URL in containerized or sandboxed environments. Since the process running in such an environment might not have access to external resources or services, using file:///proc/self/environ as a callback URL provides a way to communicate with the host system. callback-url-file-3A-2F-2F-2Fproc-2Fself-2Fenviron
To protect against these types of attacks, security experts recommend: Use containerization and sandboxing tools to restrict the
What (e.g., Node.js, Python, PHP) your application uses. security experts recommend: What (e.g.