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CVE-2026-43999

CVE-2026-43999 · vm2: NodeVM builtin allowlist bypass via `module` builtin's `Module._load` allows sandbox escape

This page contains facts from public vulnerability sources. Check the original advisory before updating.

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, NodeVM's builtin allowlist can be bypassed when the module builtin is allowed (including via the '*' wildcard). The module builtin exposes Node's Module._load(), which loads any module by name directly in the host context, completely bypassing vm2's builtin restriction. This allows sandboxed code to load excluded builtins like child_process and achieve remote code execution. This vulnerability is fixed in 3.11.0.

CVSS 9.9 · Critical · EPSS 1.0% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • vm2

    Versions
    • < 3.11.0: Affected

    No fix published

  • vm2 npm

    Versions
    • 3.10.5
    Affected ranges
    • SEMVER: ≥ 3.10.5, < 3.11.0

    Update to 3.11.0

Original sources

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