CVE-2023-29017Public exploitNetwork attack vector

Host code execution via unwrapped stack objects

Published Apr 6, 2023 · Updated Feb 10, 2025

Sandbox escape in Patrik Simek vm2 before 3.9.15 allows attackers to execute arbitrary code on the host through unhandled async errors. The prepareStackTrace wrapper passes a host-created stack-trace array and CallSite objects into attacker-controlled sandbox code without first converting every object to a sandbox-safe wrapper. Exploitation requires control of JavaScript evaluated by a VM that permits asynchronous execution, after which the sandbox boundary no longer restricts host access.

CVSS severity9.8
Critical
EPSS probability63.19%
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 before 3.9.15 allows attackers to execute arbitrary code on the host through unhandled async errors. The prepareStackTrace wrapper passes a host-created stack-trace array and CallSite objects into attacker-controlled sandbox code without first converting every object to a sandbox-safe wrapper. Exploitation requires control of JavaScript evaluated by a VM that permits asynchronous execution, after which the sandbox boundary no longer restricts host access.

The record

CVE
CVE-2023-29017
Published
Apr 6, 2023
Updated
Feb 10, 2025
Vendor
Patrik Simek
Product
vm2
Classifications
CWE-913, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 10, 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=< 3.9.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Patrik Simek · vm2version=< 3.9.15

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-913Improper Control of Dynamically-Managed Code Resources
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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