Improper Validation of Specified Quantity in Input in Kibana Leading to Denial of Service

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  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-26940",
    "assignerOrgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a",
    "assignerShortName": "elastic",
    "dateUpdated": "2026-03-19T17:48:13.985Z",
    "dateReserved": "2026-02-16T16:42:05.774Z",
    "datePublished": "2026-03-19T17:14:31.734Z",
    "state": "PUBLISHED"
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        "dateUpdated": "2026-03-19T17:14:31.734Z"
      },
      "title": "Improper Validation of Specified Quantity in Input in Kibana Leading to Denial of Service",
      "descriptions": [
        {
          "lang": "en",
          "value": "Improper Validation of Specified Quantity in Input (CWE-1284) in the Timelion visualization plugin in Kibana can lead Denial of Service via Excessive Allocation (CAPEC-130). The vulnerability allows an authenticated user to send a specially crafted Timelion expression that overwrites internal series data properties with an excessively large quantity value.",
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              "value": "<p>Improper Validation of Specified Quantity in Input (CWE-1284) in the Timelion visualization plugin in Kibana can lead Denial of Service via Excessive Allocation (CAPEC-130). The vulnerability allows an authenticated user to send a specially crafted Timelion expression that overwrites internal series data properties with an excessively large quantity value.</p>"
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "Elastic",
          "product": "Kibana",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "9.3.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "9.3.1"
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            {
              "version": "9.0.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "9.2.6"
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            {
              "version": "8.0.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "8.19.12"
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      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-1284 Improper Validation of Specified Quantity in Input",
              "cweId": "CWE-1284",
              "type": "CWE"
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          ]
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      ],
      "references": [
        {
          "url": "https://discuss.elastic.co/t/kibana-8-19-13-9-2-7-9-3-2-security-update-esa-2026-20/385535"
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-130",
          "descriptions": [
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              "lang": "en",
              "value": "CAPEC-130 Excessive Allocation"
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          ]
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      ],
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            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "LOW",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM"
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          "dateUpdated": "2026-03-19T17:48:13.985Z"
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