CVE-2026-47141CWE-668

vm2: NodeVM observability builtins leak host process and HTTP request data

Medium · published June 12, 2026

CVSS v4.0
6.9
EPSS
1%
Percentile
42.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00507 · 42.3th percentile
Weakness
CWE-668 · Exposure of Resource to Wrong Sphere
Published
2026-06-12T14:17Z
EPSS history
Timeline
  • 12 JUN 14:17Z
    vm2: NodeVM observability builtins leak host process and HTTP request data
    cvelistv5