Uncontrolled Resource Consumption in Elasticsearch Leading to denial of service

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-94396",
    "assignerOrgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a",
    "assignerShortName": "elastic",
    "dateUpdated": "2026-09-26T20:42:23.643Z",
    "dateReserved": "2026-09-21T13:29:41.419Z",
    "datePublished": "2026-09-26T20:42:23.643Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a",
        "shortName": "elastic",
        "dateUpdated": "2026-09-26T20:42:23.643Z"
      },
      "title": "Uncontrolled Resource Consumption in Elasticsearch Leading to denial of service",
      "descriptions": [
        {
          "lang": "en",
          "value": "Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead denial of service via Excessive Allocation (CAPEC-130)",
          "supportingMedia": [
            {
              "type": "text/html",
              "base64": false,
              "value": "<p>Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead denial of service via Excessive Allocation (CAPEC-130)</p>"
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "Elastic",
          "product": "Elasticsearch",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "9.2.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "9.4.6"
            },
            {
              "version": "9.5.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "9.5.3"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-400 Uncontrolled Resource Consumption",
              "cweId": "CWE-400",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://discuss.elastic.co/t/elasticsearch-9-4-7-9-5-4-security-update-esa-2026-182/390686"
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-130",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-130 Excessive Allocation"
            }
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ],
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "LOW",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM"
          }
        }
      ]
    }
  }
}