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CVE-2026-47131 patriksimek CVE debrief

CVE-2026-47131 is a critical vulnerability in vm2, an open-source vm/sandbox for Node.js. The vulnerability allows attackers to escape the sandbox and run arbitrary code. This is achieved by combining Buffer.call.call({}.__lookupGetter__, Buffer, '__proto__'), Buffer.call.call({}.__lookupSetter__, Buffer, '__proto__'), and Node.js's ERR_INVALID_ARG_TYPE Error, which allows the host's TypeError constructor to be obtained. The issue has been patched in version 3.11.4.

Vendor
patriksimek
Product
vm2
CVSS
CRITICAL 10
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-12
Original CVE updated
2026-06-13
Advisory published
2026-06-12
Advisory updated
2026-06-13

Who should care

Users of vm2, an open-source vm/sandbox for Node.js, should be aware of this vulnerability and take steps to mitigate it. This includes updating to version 3.11.4 or later.

Technical summary

The vulnerability has a CVSS score of 10 and is classified as CRITICAL. It allows attackers to escape the sandbox and run arbitrary code. The vulnerability is caused by a combination of factors, including the use of Buffer.call.call() and Node.js's ERR_INVALID_ARG_TYPE Error.

Defensive priority

High

Recommended defensive actions

  • Update vm2 to version 3.11.4 or later.
  • Review and monitor Node.js applications that use vm2 for potential exploitation attempts.

Evidence notes

The vulnerability was patched in version 3.11.4. References to the patch and advisory can be found at [ref-5](https://github.com/patriksimek/vm2/releases/tag/v3.11.4), [ref-6](https://github.com/patriksimek/vm2/security/advisories/GHSA-v6mx-mf47-r5wg), and [ref-4](https://github.com/patriksimek/vm2/commit/27c525f4615e2b983f122e2bed327d810126f5c8).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-47131 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-47131

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-47131 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-47131

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.