CVE-2026-42397

{
  "id": "CVE-2026-42397",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-21T20:17:00.593",
  "lastModified": "2026-10-24T19:10:00.127",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). An authenticated user can submit a specially crafted request to affected Entity Analytics endpoints containing an oversized input value that causes excessive resource consumption, which may render Kibana unavailable."
    },
    {
      "lang": "es",
      "value": "La Asignación de Recursos Sin Límites o Limitación (CWE-770) en Kibana puede conducir a una denegación de servicio a través de Asignación Excesiva (CAPEC-130). Un usuario autenticado puede enviar una solicitud especialmente diseñada a los puntos finales afectados de Entity Analytics que contiene un valor de entrada sobredimensionado que provoca un consumo excesivo de recursos, lo que puede dejar a Kibana no disponible."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Elastic",
          "product": "Kibana",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "9.4.0",
              "lessThanOrEqual": "9.4.3",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "9.3.0",
              "lessThanOrEqual": "9.3.6",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-22T18:13:52.467641Z",
          "id": "CVE-2026-42397",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "9.3.0",
              "versionEndExcluding": "9.3.7",
              "matchCriteriaId": "5C1050D2-186B-40DA-9E10-BC820987BD72"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "9.4.0",
              "versionEndExcluding": "9.4.4",
              "matchCriteriaId": "DE10B417-76BB-4C6D-8D1C-5B029497F013"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://discuss.elastic.co/t/kibana-9-3-7-9-4-4-security-update-esa-2026-55/388554/1",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}