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Medium 4.0
Environment variables still accessible through /proc
### Impact Environment variables can be read from procfs unless a new process is started. ### PoC ``` use birdcage::{Birdcage, Sandbox}; use std::{env, fs}; fn main() { Birdcage::new().lock().unwrap(); assert_eq!(env::var_os("SECRET"), None); let environ = fs…