CVE-2026-92948

9.9 CRITICALpublic exploit available

Published 2026-09-17 · Updated 2026-09-18

AI risk analysis

Summary: The flaw allows a sandbox escape by bypassing vm2's allowlist, permitting execution of arbitrary JavaScript in a Node.js environment.
Exploitability: Exploitation requires explicit allowlisting of the 'node:test' module, which is uncommon but possible in certain configurations.
Blast radius: If exploited, this could lead to full control over the host Node.js environment, including execution of arbitrary code.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to vm2 3.11.7 or later.

rcevm-bypassnodejssandbox-escape

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

NVD description

vm2 versions >= 3.9.6 and <= 3.11.6 are affected by a NodeVM builtin allowlist bypass that permits a sandbox escape on Node.js 24 and newer when the embedder explicitly allows the node:test builtin (e.g. require: { builtin: ['node:test'] }). On Node.js 24+, module.builtinModules exposes the scheme-only key node:test, which is not covered by vm2's family-based DANGEROUS_BUILTINS protection, so it is stored in the generic host-passthrough loader. Because requireImpl() in lib/setup-node-sandbox.js strips a single 'node:' prefix before the builtin lookup, sandbox code calling require('node:node:test') resolves to the stored node:test key and receives a readonly proxy to the host module. Calls to node:test.run() are forwarded to the host implementation, which spawns a separate Node process for process-isolated test execution and passes through attacker-controlled execArgv values; supplying --eval=<JavaScript> therefore executes arbitrary JavaScript in an unrestricted host Node process outside the NodeVM sandbox. Fixed in vm2 3.11.7.

CVSS vector

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

Weaknesses

CWE-693

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.

Related CVEs

Related by shared AI tags and CWE weakness class. Browse the full archive.