Memory Allocation with Excessive Size Value in Metricbeat Leading to Denial of Service

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-26931",
    "assignerOrgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a",
    "assignerShortName": "elastic",
    "dateUpdated": "2026-03-19T17:20:38.549Z",
    "dateReserved": "2026-02-16T16:42:05.773Z",
    "datePublished": "2026-03-19T17:05:57.514Z",
    "state": "PUBLISHED"
  },
  "containers": {
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        "shortName": "elastic",
        "dateUpdated": "2026-03-19T17:05:57.514Z"
      },
      "title": "Memory Allocation with Excessive Size Value in Metricbeat Leading to Denial of Service",
      "descriptions": [
        {
          "lang": "en",
          "value": "Memory Allocation with Excessive Size Value (CWE-789) in the Prometheus remote_write HTTP handler in Metricbeat can lead Denial of Service via Excessive Allocation (CAPEC-130).",
          "supportingMedia": [
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              "value": "<p>Memory Allocation with Excessive Size Value (CWE-789) in the Prometheus remote_write HTTP handler in Metricbeat can lead Denial of Service via Excessive Allocation (CAPEC-130).</p>"
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          ]
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      ],
      "affected": [
        {
          "vendor": "Elastic",
          "product": "Metricbeat",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8.0.0",
              "status": "affected",
              "versionType": "semver",
              "lessThanOrEqual": "8.19.12"
            }
          ]
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      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-789 Memory Allocation with Excessive Size Value",
              "cweId": "CWE-789",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://discuss.elastic.co/t/metricbeat-8-19-13-9-2-5-security-update-esa-2026-09/385532"
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-130",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-130 Excessive Allocation"
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          ]
        }
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      "metrics": [
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          "format": "CVSS",
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              "lang": "en",
              "value": "GENERAL"
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          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "attackVector": "ADJACENT_NETWORK",
            "attackComplexity": "LOW",
            "privilegesRequired": "LOW",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "availabilityImpact": "HIGH",
            "baseScore": 5.7,
            "baseSeverity": "MEDIUM"
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          "shortName": "CISA-ADP",
          "dateUpdated": "2026-03-19T17:20:38.549Z"
        },
        "title": "CISA ADP Vulnrichment",
        "metrics": [
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      }
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  }
}