CVE-2026-92935

vm2 NodeVM Remote Code Execution via Array-Shaped Require

State
Published
Severity
9.5 Critical
Published
Sep 17, 2026
Updated
Sep 17, 2026
Reserved
Sep 17, 2026

Read the record on cve.org

Description

vm2 is a sandbox for running untrusted Node.js code. In versions >= 3.11.4 and <= 3.11.6, the NodeVM constructor computes `hasRealRequireConfig` with `typeof requireOpts === 'object' && requireOpts !== null`, so an array-shaped `require` value (for example `require: []`) satisfies the guard that is meant to reject nesting without an explicit require configuration. `makeResolverFromLegacyOptions()` then destructures the array into undefined option fields and returns a resolver containing only `NESTING_OVERRIDE.vm2`. As a result, an attacker who can supply JavaScript executed by a NodeVM configured with truthy `nesting` and an array-shaped `require` (e.g. `new NodeVM({nesting: true, require: []})`) can require the host `vm2` module, create an inner NodeVM with an attacker-chosen builtin allowlist (such as `child_process`), and execute arbitrary commands with the privileges of the host Node.js process, escaping the sandbox. Outer builtin restrictions do not constrain the attacker-created inner NodeVM. This issue is fixed in vm2 3.11.7.

Scores

CVSSScoreVectorSource
4.09.5 CriticalCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:HVulnCheck
3.19.0 CriticalCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HVulnCheck

Weaknesses

  • CWE-913 Improper Control of Dynamically-Managed Code Resources

Affected Products

ProductVersions
vm2patriksimek
  • 3.11.4 to before 3.11.7Affected
  • 3.11.7Not affected

References

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