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CVE-2026-26931

Estado: AnalizadaMedia (5.7)—

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).

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Elastic — Metricbeat

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-26931",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-26931",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-19T17:20:32.317500Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@elastic.co",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.7,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.1
      }
    ]
  },
  "affected": [
    {
      "source": "security@elastic.co",
      "affectedData": [
        {
          "vendor": "Elastic",
          "product": "Metricbeat",
          "versions": [
            {
              "status": "affected",
              "version": "8.0.0",
              "versionType": "semver",
              "lessThanOrEqual": "8.19.12"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-03-19T17:16:23.320",
  "references": [
    {
      "url": "https://discuss.elastic.co/t/metricbeat-8-19-13-9-2-5-security-update-esa-2026-09/385532",
      "tags": [
        "Mitigation",
        "Vendor Advisory"
      ],
      "source": "security@elastic.co"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@elastic.co",
      "description": [
        {
          "lang": "en",
          "value": "CWE-789"
        }
      ]
    }
  ],
  "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)."
    },
    {
      "lang": "es",
      "value": "Asignación de memoria con un valor de tamaño excesivo (CWE-789) en el gestor HTTP Prometheus remote_write en Metricbeat puede provocar denegación de servicio mediante asignación excesiva (CAPEC-130)."
    }
  ],
  "lastModified": "2026-09-04T13:37:13.493",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:elastic:metricbeat:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "1DB90182-12D4-4DA5-B8BB-84F8E0F66AC8",
              "versionEndExcluding": "8.19.13",
              "versionStartIncluding": "8.0.0"
            },
            {
              "criteria": "cpe:2.3:a:elastic:metricbeat:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0D955E6A-3375-4FB5-91E9-D7044341D871",
              "versionEndExcluding": "9.2.5",
              "versionStartIncluding": "9.0.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@elastic.co"
}