vm2 sandbox escape via WebAssembly.compileStreaming Promise species bypass

Summary There is a sandbox escape in vm2 3.11.5 / current HEAD when it is used on Node.js 26. The issue is reachable from a default new VM sandbox. No NodeVM, require permission, host object injection, or intentionally unsafe configuration is required. The escape is a patch-bypass of the same...

vm2 sandbox escape on Node.js 26 through a stale PromiseThenLookupChain protector

Reporter - Name or handle: YMsora - Report date: 2026-08-14 Summary The latest published vm2 release, 3.11.5, and the current main branch are vulnerable to a sandbox escape when used on Node.js 26. An ordinary fulfilled Promise created by an async function can retain an attacker-controlled...

CVE-2026-93606

vm2 npm versions 3.12.0 and earlier contain a sandbox escape in VM and NodeVM. When an embedder exposes a host API that returns a host-realm Promise, the bridge's rejection sanitizer hostPromiseSanitizeReject / makeSanitizedPromiseCallback / normalizeHostPromiseCallbacks in lib/bridge.js only wra...

CVE-2026-93606 vm2 before 3.12.1 Sandbox Escape via Promise Symbol.species

vm2 npm versions 3.12.0 and earlier contain a sandbox escape in VM and NodeVM. When an embedder exposes a host API that returns a host-realm Promise, the bridge's rejection sanitizer hostPromiseSanitizeReject / makeSanitizedPromiseCallback / normalizeHostPromiseCallbacks in lib/bridge.js only wra...

CVE-2026-93606

CVE-2026-93606 affects vm2 (npm) versions 3.12.0 and earlier, specifically the VM and NodeVM sandbox implementations. The root cause lies in lib/bridge.js: the bridge's rejection sanitizer only wraps then/catch rejection slots holding a function, and the Symbol.species/.then neutralization is app...

EUVD-2026-82901

vm2 npm versions 3.12.0 and earlier contain a sandbox escape in VM and NodeVM. When an embedder exposes a host API that returns a host-realm Promise, the bridge's rejection sanitizer hostPromiseSanitizeReject / makeSanitizedPromiseCallback / normalizeHostPromiseCallbacks in lib/bridge.js only wra...

CVE-2026-93606 vm2 before 3.12.1 Sandbox Escape via Promise Symbol.species

vm2 npm versions 3.12.0 and earlier contain a sandbox escape in VM and NodeVM. When an embedder exposes a host API that returns a host-realm Promise, the bridge's rejection sanitizer hostPromiseSanitizeReject / makeSanitizedPromiseCallback / normalizeHostPromiseCallbacks in lib/bridge.js only wra...

CVE-2026-93606 vm2 before 3.12.1 Sandbox Escape via Promise Symbol.species

vm2 npm versions 3.12.0 and earlier contain a sandbox escape in VM and NodeVM. When an embedder exposes a host API that returns a host-realm Promise, the bridge's rejection sanitizer hostPromiseSanitizeReject / makeSanitizedPromiseCallback / normalizeHostPromiseCallbacks in lib/bridge.js only wra...

Protection Mechanism Failure

Overview vm2 is a sandbox that can run untrusted code with whitelisted Node's built-in modules. Affected versions of this package are vulnerable to Protection Mechanism Failure in the Promise.prototype.finally process. An attacker can execute arbitrary code by crafting an async function that...

Duplicate Advisory: vm2 sandbox escape via WebAssembly.compileStreaming Promise species bypass

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-wjwh-qqvp-g4p4. This link is maintained to preserve external references. Original Description vm2 versions 3.10.1 through 3.11.6 contain a sandbox escape reachable from a default new VM sandbox when running on...

GHSA-538Q-XXPG-6H4R Duplicate Advisory: vm2 sandbox escape via WebAssembly.compileStreaming Promise species bypass

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-wjwh-qqvp-g4p4. This link is maintained to preserve external references. Original Description vm2 versions 3.10.1 through 3.11.6 contain a sandbox escape reachable from a default new VM sandbox when running on...

CVE-2026-92956

vm2 versions 3.10.1 through 3.11.6 contain a sandbox escape reachable from a default new VM sandbox when running on Node.js 26. WebAssembly.compileStreaming and WebAssembly.instantiateStreaming can produce a raw host-realm Promise that rejects with a host-realm error object; by controlling...

CVE-2026-92956: Protection Mechanism Failure

vm2 versions 3.10.1 through 3.11.6 contain a sandbox escape reachable from a default new VM sandbox when running on Node.js 26. WebAssembly.compileStreaming and WebAssembly.instantiateStreaming can produce a raw host-realm Promise that rejects with a host-realm error object; by controlling...

Microsoft Edge - 'Array.map' Heap Overflow (MS16-119)

var b = new Array1,2,3; var d = new Array1,2,3; class dummy constructor alert"in constructor"; return d; var handler = get: functiontarget, name ifname == "length" return 0x100; return Symbol.species : dummy; , has: functiontarget, name alert"has " + name; return true; ; var p = new Proxy, handle...