CVE-2018-12541

Estado: ModificadaMedia (6.5)—
In version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the WebSocket HTTP upgrade implementation buffers the full http request before doing the handshake, holding the entire request body in memory. There should be a reasonnable limit (8192 bytes) above which the WebSocket gets an HTTP response with the 413 status code and the connection gets closed.
CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 6.5
Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 2.65%
Percentil entre todas las CVEs puntuadas: 85
Fecha de la puntuación: 3/10/2026
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)

Eclipse — Vert.x
CWE

CWE-789
CWE-119
Referencias

JSON original (NVD)

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{
  "id": "CVE-2018-12541",
  "cveTags": [],
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        "source": "nvd@nist.gov",
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          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
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        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
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        "impactScore": 3.6,
        "exploitabilityScore": 2.8
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  "published": "2018-10-10T20:29:00.380",
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      "type": "Secondary",
      "source": "emo@eclipse.org",
      "description": [
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          "lang": "en",
          "value": "CWE-789"
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      "source": "nvd@nist.gov",
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      "lang": "en",
      "value": "In version from 3.0.0 to 3.5.3 of Eclipse Vert.x, the WebSocket HTTP upgrade implementation buffers the full http request before doing the handshake, holding the entire request body in memory. There should be a reasonnable limit (8192 bytes) above which the WebSocket gets an HTTP response with the 413 status code and the connection gets closed."
    },
    {
      "lang": "es",
      "value": "De las versiones 3.0.0 a 3.5.3 de Eclipse Vert.x, la implementación de la actualización HTTP WebSocket almacena la petición HTTP completa antes de realizar el handshake, lo que mantiene todo el cuerpo de la petición en la memoria. Debería existir un límite razonable (8192 bytes) sobre el cual WebSocket obtiene una respuesta HTTP con el código de estado 413 y la conexión se cierra."
    }
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  "lastModified": "2026-06-17T01:37:56.400",
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