vm2 sandbox escape via JSPI-backed Promise `.finally()` species bypass

Summary A sandbox escape vulnerability in vm2 allows arbitrary code execution in the host process when untrusted code is executed with async support on runtimes exposing WebAssembly JSPI WebAssembly.promising / WebAssembly.Suspending. In the tested configuration, a JSPI-backed Promise can reach...

Arbitrary Code Injection

Overview org.webjars.npm:vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules. Affected versions of this package are vulnerable to Arbitrary Code Injection through the proxy trap methods in createBridge in the bridge handler code. An attacker can leak a handler...