EUVD-2026-87856

vm2: NodeVM zlib Buffers expose pooled host memory across the VM boundary...

vm2: Sandboxed code can read and write host-realm memory via Node's shared Buffer pool

Summary Sandboxed code is able to disclose host memory used by small allocations by Buffer.from, Buffer.concat. Details vm2 exposes Buffer object to sandboxed code by default. Small Buffer allocations for example, Buffer.allocUnsafe, Buffer.fromarray, Buffer.fromstring, and Buffer.concat use the...