vm2 before 3.11.8 does not fully enforce the allowAsync: false option in VM and NodeVM. While localPromise.prototype.then is replaced with a handler that throws 'Async not available', the sandbox's Promise static methods (Promise.resolve, Promise.all, Promise.race, Promise.any, and Promise.allSettled) still assimilate attacker-supplied thenables: native promise resolution performs PromiseResolveThenableJob and invokes the sandboxed code's then method in a microtask without passing through the patched then, so the async restriction is never applied. As a result, sandboxed script can schedule work that runs after VM.run() or NodeVM.run() has returned and outside the configured timeout, continuing to execute after the host believes execution is complete.

vm2 before 3.11.8 does not fully enforce the allowAsync: false option in VM and NodeVM. While localPromise.prototype.then is replaced with a handler that throws 'Async not available', the sandbox's Promise static methods (Promise.resolve, Promise.all, Promise.race, Promise.any, and Promise.allSettled) still assimilate attacker-supplied thenables: native promise resolution performs PromiseResolveThenableJob and invokes the sandboxed code's then method in a microtask without passing through the patched then, so the async restriction is never applied. As a result, sandboxed script can schedule work that runs after VM.run() or NodeVM.run() has returned and outside the configured timeout, continuing to execute after the host believes execution is complete.

multer: Multer: Denial of Service via aborted or malformed multipart uploads undici: undici: Denial of Service via unrequested WebSocket subprotocol vm2: vm2: Denial of Service due to memory allocation limit bypass urllib: urllib: Credential leakage via cross-origin redirects js-yaml: js-yaml: Denial of Service via crafted YAML documents immutable-js: Immutable.js: Denial of Service due to mishandling of large index values in List operations qs: qs: Denial of Service via improper validation in stringify function js-yaml: js-yaml: Denial of Service vulnerability in YAML parsing compression: compression: Denial of Service via memory leak on premature response close multer: multer: Denial of Service via orphaned disk writes on aborted uploads isomorphic-git: isomorphic-git: Information disclosure via prototype pollution in getRemoteInfo function. adm-zip: adm-zip: Denial of Service via crafted ZIP archives with zero declared uncompressed size vm2: vm2: Denial of Service via timeout bypass in sandboxed code vm2: vm2: Sandbox escape via denylist bypass in NodeVM vm2: vm2: Asynchronous code execution bypass via Promise thenable assimilation vm2: vm2: Denial of Service via memory exhaustion