CVE-2026-92939

9.9 CRITICALpublic exploit available

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

AI risk analysis

Summary: This flaw allows sandboxed JavaScript to escape the NodeVM sandbox by calling the crypto.setEngine() method with a filesystem path to an attacker-supplied native library, leading to arbitrary code execution.
Exploitability: Exploitation is relatively straightforward as it requires only the crypto builtin and no other Node.js features, making it a significant risk.
Blast radius: If exploited, this flaw could lead to full control over the host system, enabling attackers to execute arbitrary code with the privileges of the Node.js process.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to vm2 3.11.7 or later.

rcecryptovmnodejssandbox-escapenative-code-execution

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

NVD description

vm2 3.11.3 through 3.11.6 exposes the host Node.js crypto module to a NodeVM sandbox when the crypto builtin is allowed. The module is presented via a recursive read-only proxy, but its callable exports still execute with host-process authority. Sandboxed JavaScript can therefore call crypto.setEngine() with a filesystem path to an attacker-supplied native library (for example, one bundled in an untrusted plugin package already written to disk); OpenSSL asks the operating-system dynamic loader to load the file, and the library's constructor executes native code in the host process before engine-symbol validation rejects it. Exploitation requires only the crypto builtin and does not require fs, process, module, child_process, worker_threads, vm, or inspector access, resulting in a sandbox escape and arbitrary native code execution. Fixed in 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-114

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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