CVE-2023-32314Public exploitNetwork attack vector

Host code execution via Proxy argument-array leak

Published May 15, 2023 · Updated Jan 22, 2025

Sandbox escape in Patrik Simek vm2 3.9.17 and earlier allows remote attackers to execute code on the host through crafted sandbox code. Error stack preparation calls attacker-controlled err.name.toString through a Proxy from the host context; Proxy then exposes a host-created argument array whose constructor reaches host Function. The default VM configuration is sufficient, and commands run with the privileges of the Node.js host process.

CVSS severity9.8
Critical
EPSS probability8.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox escape in Patrik Simek vm2 3.9.17 and earlier allows remote attackers to execute code on the host through crafted sandbox code. Error stack preparation calls attacker-controlled err.name.toString through a Proxy from the host context; Proxy then exposes a host-created argument array whose constructor reaches host Function. The default VM configuration is sufficient, and commands run with the privileges of the Node.js host process.

The record

CVE
CVE-2023-32314
Published
May 15, 2023
Updated
Jan 22, 2025
Vendor
Patrik Simek
Product
vm2
Classifications
CWE-74, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 22, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.9.18

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Patrik Simek · vm2version=< 3.9.18

Published CVSS scores

9.8GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1059.007Command and Scripting Interpreter: JavaScript

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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