CVE-2022-21676

Estado: ModificadaAlta (7.5)—

Engine.IO is the implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO. A specially crafted HTTP request can trigger an uncaught exception on the Engine.IO server, thus killing the Node.js process. This impacts all the users of the `engine.io` package starting from version `4.0.0`, including those who uses depending packages like `socket.io`. Versions prior to `4.0.0` are not impacted. A fix has been released for each major branch, namely `4.1.2` for the `4.x.x` branch, `5.2.1` for the `5.x.x` branch, and `6.1.1` for the `6.x.x` branch. There is no known workaround except upgrading to a safe version.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 7.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 2.76%
Percentil entre todas las CVEs puntuadas: 86
Fecha de la puntuación: 6/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Socket — Engine.io

CWE

CWE-754
CWE-755

Referencias

JSON original (NVD)

Mostrar

{
  "id": "CVE-2022-21676",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-21676",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-04-23T15:58:14.583594Z"
        }
      }
    ],
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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    "cvssMetricV31": [
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        "type": "Secondary",
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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  "affected": [
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              "status": "affected",
              "version": ">= 6.0.0, < 6.1.1"
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  "published": "2022-01-12T19:15:09.217",
  "references": [
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      "tags": [
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      "url": "https://github.com/socketio/engine.io/commit/a70800d7e96da32f6e6622804ef659ebc58659db",
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      "tags": [
        "Release Notes",
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      "source": "security-advisories@github.com"
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    {
      "url": "https://github.com/socketio/engine.io/commit/66f889fc1d966bf5bfa0de1939069153643874ab",
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      "url": "https://github.com/socketio/engine.io/commit/a70800d7e96da32f6e6622804ef659ebc58659db",
      "tags": [
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      "tags": [
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        "Third Party Advisory"
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      "tags": [
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        "Third Party Advisory"
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    },
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        "Third Party Advisory"
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      "tags": [
        "Third Party Advisory"
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-754"
        }
      ]
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    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-755"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Engine.IO is the implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO. A specially crafted HTTP request can trigger an uncaught exception on the Engine.IO server, thus killing the Node.js process. This impacts all the users of the `engine.io` package starting from version `4.0.0`, including those who uses depending packages like `socket.io`. Versions prior to `4.0.0` are not impacted. A fix has been released for each major branch, namely `4.1.2` for the `4.x.x` branch, `5.2.1` for the `5.x.x` branch, and `6.1.1` for the `6.x.x` branch. There is no known workaround except upgrading to a safe version."
    },
    {
      "lang": "es",
      "value": "Engine.IO es la implementación de la capa de comunicación bidireccional entre navegadores y dispositivos para Socket.IO. Una petición HTTP especialmente diseñada puede desencadenar una excepción no capturada en el servidor de Engine.IO, matando así el proceso de Node.js. Esto afecta a todos los usuarios del paquete \"engine.io\" a partir de la versión \"4.0.0\", incluyendo aquellos que usan paquetes dependientes como \"socket.io\". Las versiones anteriores a \"4.0.0\" no están afectadas. Ha sido publicado una corrección para cada rama principal, a saber, \"4.1.2\" para la rama \"4.x.x\", \"5.2.1\" para la rama \"5.x.x\", y \"6.1.1\" para la rama \"6.x.x\". No se presenta ninguna medida de mitigación conocida, excepto la actualización a una versión segura"
    }
  ],
  "lastModified": "2026-06-17T04:26:44.410",
  "configurations": [
    {
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              "criteria": "cpe:2.3:a:socket:engine.io:*:*:*:*:*:node.js:*:*",
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              "versionEndExcluding": "6.1.1",
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          "operator": "OR"
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}