CVE-2026-92957

9.9 CRITICALpublic exploit available

Published 2026-09-17 · Updated 2026-09-17

AI risk analysis

Summary: The flaw allows sandboxed code to bypass the built-in deny-list by using `node:`-prefixed specifiers, gaining access to potentially dangerous APIs like `child_process`, which can lead to command execution.
Exploitability: Exploitation is relatively straightforward once the precondition of having control over the policy configuration is met.
Blast radius: If exploited, this could result in unauthorized command execution within the sandbox, potentially leading to full host compromise.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to vm2 3.11.7 or later.

rcevm2nodejssandboxbypass

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

vm2 through 3.11.6 does not normalize `node:`-prefixed builtin specifiers when evaluating user-supplied negative (deny) entries in a NodeVM wildcard require policy. Although NodeVM strips the `node:` prefix during require() resolution, negative wildcard entries are matched by exact string comparison against the canonical builtin names, so a policy such as `new NodeVM({ require: { builtin: ['*', '-node:child_process'] } })` fails to deny the canonical `child_process` module. Sandboxed code can therefore obtain the host `child_process` builtin via `require('child_process')` or `require('node:child_process')`, gaining references to process-spawning APIs such as execSync and spawn, which is equivalent to host command-execution capability for untrusted sandbox code. Fixed in vm2 3.11.7. (Suggested title: "vm2 before 3.11.7: NodeVM builtin deny-list bypass via node:-prefixed specifiers exposes child_process")

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weaknesses

CWE-269

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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