CVE-2026-63335

{
  "id": "CVE-2026-63335",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-18T17:17:00.130",
  "lastModified": "2026-10-22T22:10:00.250",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.31.0, inbound AMQP command assembly in src/main/java/com/rabbitmq/client/impl/CommandAssembler.java processes a content-bearing method and header whose remainingBodyBytes value is smaller than a following AMQP.FRAME_BODY payload. CommandAssembler.consumeBodyFrame subtracts the peer-controlled payload length before validating that it fits, drives remainingBodyBytes negative, and throws a raw UnsupportedOperationException instead of MalformedFrameException. A malicious or compromised broker peer can send this malformed sequence on an open nonzero channel to terminate frame processing and close the client connection, causing denial of service for work using that connection. This issue is fixed in version 5.31.0."
    },
    {
      "lang": "es",
      "value": "La biblioteca cliente Java de RabbitMQ permite que las aplicaciones Java y basadas en JVM se conecten e interactúen con los nodos de RabbitMQ. Antes de la versión 5.31.0, el ensamblaje de comandos AMQP entrantes en src/main/java/com/rabbitmq/client/impl/CommandAssembler.java procesa un método y una cabecera que contienen contenido, cuyo valor de remainingBodyBytes es menor que una carga útil AMQP.FRAME_BODY subsiguiente. CommandAssembler.consumeBodyFrame resta la longitud de la carga útil controlada por el par antes de validar que encaja, hace que remainingBodyBytes sea negativo y lanza una UnsupportedOperationException en bruto en lugar de una MalformedFrameException. Un par de broker malicioso o comprometido puede enviar esta secuencia malformada en un canal abierto no nulo para terminar el procesamiento de tramas y cerrar la conexión del cliente, causando denegación de servicio para el trabajo que utiliza esa conexión. Este problema está solucionado en la versión 5.31.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "rabbitmq",
          "product": "rabbitmq-java-client",
          "versions": [
            {
              "version": "< 5.31.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "baseScore": 6.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "HIGH",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-18T17:43:20.756926Z",
          "id": "CVE-2026-63335",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/rabbitmq/rabbitmq-java-client/commit/31735344d9f9dfc53740b67f06e560e8846b9322",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/rabbitmq/rabbitmq-java-client/commit/abd6d60d4e2bfc1a327dc90ab246b2e8aca1f33b",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/rabbitmq/rabbitmq-java-client/pull/1959",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/rabbitmq/rabbitmq-java-client/pull/1960",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/rabbitmq/rabbitmq-java-client/releases/tag/v5.31.0",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-qx7j-jv8m-fppr",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-qx7j-jv8m-fppr",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}