As per WABT's SECURITY.txt, #2831 issue exists For context: WABT is a Binary Toolkit for WebAssembly developed by WebAssembly.org (W3C) wasm2c is a tool inside of it, which is used by many projects like FireFox (via RLBox) to compile wasm down to a sandboxed c library, the assumption is the built C code preserves all WebAssembly's sandbox security features. This PoC demonstrates escaping that sandbox. submitted by /u/trustsigRobert