CVE-2026-92961Public exploitNetwork attack vector

Host memory exhaustion via uncapped V8 constructors

Published Sep 17, 2026 · Updated Sep 21, 2026

Denial of service in Patrik Simek vm2 before 3.11.6 allows remote attackers to exhaust host memory via sandboxed JavaScript. The bufferAllocLimit check wraps Buffer allocation APIs but not ArrayBuffer, SharedArrayBuffer, or TypedArray constructors, which invoke the same synchronous V8 backing-store allocator without the configured cap. Exploitation requires an application to run attacker-controlled code inside vm2; one oversized allocation can terminate the host process under an out-of-memory condition.

CVSS severity8.7
High
EPSS probability0.53%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Patrik Simek vm2 before 3.11.6 allows remote attackers to exhaust host memory via sandboxed JavaScript. The bufferAllocLimit check wraps Buffer allocation APIs but not ArrayBuffer, SharedArrayBuffer, or TypedArray constructors, which invoke the same synchronous V8 backing-store allocator without the configured cap. Exploitation requires an application to run attacker-controlled code inside vm2; one oversized allocation can terminate the host process under an out-of-memory condition.

The record

CVE
CVE-2026-92961
Published
Sep 17, 2026
Updated
Sep 21, 2026
Vendor
Patrik Simek
Product
vm2
Classifications
CWE-770, CAPEC-130, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 21, 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=0 <3.11.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Patrik Simek · vm2version=0 <3.11.6

Published CVSS scores

8.7VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.

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-770Allocation of Resources Without Limits or Throttling
CAPEC-130Excessive Allocation
T1499.004Endpoint Denial of Service: Application 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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