{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Horovod thru 0.28.1 contains an insecure deserialization vulnerability (CWE-502) in its KVStore HTTP server component. The KVStore server, used for distributed task coordination, lacks authentication and authorization controls, allowing any remote attacker to write arbitrary data via HTTP PUT requests. When a Horovod worker reads data from the KVStore (via HTTP GET), it deserializes the data using cloudpickle.loads() without verifying its source or integrity. An attacker can exploit this by sending a malicious pickle payload to the server before the legitimate data is written, causing the victim worker to deserialize and execute arbitrary code, leading to remote code execution."
    },
    {
      "lang": "es",
      "value": "Horovod hasta 0.28.1 contiene una vulnerabilidad de deserializaci\u00f3n insegura (CWE-502) en su componente de servidor HTTP KVStore. El servidor KVStore, utilizado para la coordinaci\u00f3n de tareas distribuidas, carece de controles de autenticaci\u00f3n y autorizaci\u00f3n, lo que permite a cualquier atacante remoto escribir datos arbitrarios a trav\u00e9s de solicitudes HTTP PUT. Cuando un worker de Horovod lee datos del KVStore (a trav\u00e9s de HTTP GET), deserializa los datos usando cloudpickle.loads() sin verificar su origen o integridad. Un atacante puede explotar esto enviando una carga \u00fatil pickle maliciosa al servidor antes de que se escriban los datos leg\u00edtimos, lo que hace que el worker v\u00edctima deserialice y ejecute c\u00f3digo arbitrario, lo que lleva a la ejecuci\u00f3n remota de c\u00f3digo."
    }
  ],
  "id": "CVE-2026-31234",
  "lastModified": "2026-10-19T22:10:00.130",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-31234",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-14T17:08:45.343529Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-12T18:16:51.743",
  "references": [
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/horovod/horovod"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://www.notion.so/CVE-2026-31234-35d1e139318881d585cde508b9d2453c"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}