CVE-2026-92953Public exploitNetwork attack vectorHinoki check available

Host prototype pollution via incomplete intrinsic protection

Published Sep 17, 2026 · Updated Sep 18, 2026

Prototype pollution in vm2 3.11.0 through 3.11.7 allows attackers to corrupt host typed-array behavior via sandboxed code. The bridge's protectedHostObjects inventory omits TypedArray and ArrayBuffer prototypes, so prototype-walking from Buffer forwards property writes into host intrinsics. Access to execute JavaScript in a default VM is required; successful exploitation alters shared host behavior and can disrupt applications without directly reading host data or executing host commands.

CVSS severity9.3
Critical
EPSS probability0.50%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Prototype pollution in vm2 3.11.0 through 3.11.7 allows attackers to corrupt host typed-array behavior via sandboxed code. The bridge's protectedHostObjects inventory omits TypedArray and ArrayBuffer prototypes, so prototype-walking from Buffer forwards property writes into host intrinsics. Access to execute JavaScript in a default VM is required; successful exploitation alters shared host behavior and can disrupt applications without directly reading host data or executing host commands.

The record

CVE
CVE-2026-92953
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
Patrik Simek
Product
vm2
Classifications
CWE-913, CWE-1321, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record 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=3.11.0 <3.11.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Patrik Simek · vm2version=3.11.0 <3.11.8

Published CVSS scores

10.0VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H
9.3VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA: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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 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
CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
T1499.004Application or System Exploitation

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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