CVE-2026-93605: vm2 contains a sandbox escape vulnerability

vm2 NodeVM versions before 3.12.1 contain a sandbox escape vulnerability where the DANGEROUS_BUILTINS denylist omits child_process despite blocking other host-spawning modules. Attackers can require child_process and execute arbitrary commands on the host system when NodeVM is configured with builtin:[’*’] or explicit child_process allowance.

This fork hardens NodeVM with a DANGEROUS_BUILTINS denylist that blocks host‑code‑reaching core modules even when the sandbox requests builtin:['*'] or names them explicitly — the list contains module, worker_threads, cluster, vm, repl, inspector, process, trace_events, wasi, diagnostics_channel, async_hooks, perf_hooks, v8, os, dns, and test. It omits child_process — the single most direct command‑execution primitive. As a result, a sandbox running under require:{builtin:['*']} (or the fork’s own documented ['*','-http','-net',…] subtract pattern) can require('child_process').execSync(...) and execute arbitrary commands on the host. The omission is internally inconsistent: cluster is denied with the explicit rationale “cluster.fork() spawns a host child process running attacker‑controlled code,” yet child_process — which spawns host processes more directly — is not.