vm2: NodeVM observability builtins leak host process and HTTP request data
CVE-2026-47141
6.9MEDIUM
What is CVE-2026-47141?
vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, NodeVM exposes some process-wide observability builtins when they are allowed through require.builtin. The diagnostics_channel, async_hooks, and perf_hooks builtins are not blocked by the dangerous builtin denylist. These modules are process-wide, not sandbox-local. Sandboxed code can use them to observe host application data across the vm2 boundary. This issue has been patched in version 3.11.4.
Affected Version(s)
vm2 < 3.11.4