A sandbox escape exists when running on Node.js 26. The issue occurs because `WebAssembly.compileStreaming` and `WebAssembly.instantiateStreaming` can produce a raw host-realm Promise that rejects with a host-realm error object. By controlling `Symbol.species` via `Promise.prototype.finally`, sandbox code can obtain this raw host error, navigate from the host error constructor to the host Function constructor, and recover the host `process` object. This allows the attacker to gain host Node.js capabilities, such as access to host modules like `fs`, within the process running the sandbox. This escape is possible using a default `new VM()` sandbox and does not require NodeVM, require permissions, host object injection, or any unsafe configuration.