« Volver al listado

CVE-2026-72639

Estado: AnalizadaMedia (6.5)—

Elasticsearch does not enforce an upper bound on a user-supplied count accepted by a search highlighting option, and the allocation derived from that count is not accounted against any circuit breaker. An authenticated user holding only read privileges on a single searchable index can submit one small search request that causes the node to reserve an excessively large internal data structure. The allocation occurs before the existing highlighting safety limits are evaluated, so memory exhaustion raises a fatal error that terminates the Elasticsearch node process.

Leer descripción completaMostrar menos

This results in a denial of service for the affected node and degrades cluster routing and health. The defect is not volumetric and does not depend on the size of the indexed data, so a single request is sufficient.

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 — Elasticsearch

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-72639",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-72639",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-08-13T19:49:22.550689Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@elastic.co",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/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": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@elastic.co",
      "affectedData": [
        {
          "vendor": "Elastic",
          "product": "Elasticsearch",
          "versions": [
            {
              "status": "affected",
              "version": "8.19.0",
              "versionType": "semver",
              "lessThanOrEqual": "8.19.19"
            },
            {
              "status": "affected",
              "version": "9.3.0",
              "versionType": "semver",
              "lessThanOrEqual": "9.5.0"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-08-13T20:17:24.427",
  "references": [
    {
      "url": "https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-9-5-1-security-update-esa-2026-120/389503",
      "tags": [
        "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": "Elasticsearch does not enforce an upper bound on a user-supplied count accepted by a search highlighting option, and the allocation derived from that count is not accounted against any circuit breaker. An authenticated user holding only read privileges on a single searchable index can submit one small search request that causes the node to reserve an excessively large internal data structure. The allocation occurs before the existing highlighting safety limits are evaluated, so memory exhaustion raises a fatal error that terminates the Elasticsearch node process. This results in a denial of service for the affected node and degrades cluster routing and health. The defect is not volumetric and does not depend on the size of the indexed data, so a single request is sufficient."
    }
  ],
  "lastModified": "2026-09-01T14:08:36.907",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "04A4B6FB-C74F-4992-B078-CF38D80D479E",
              "versionEndExcluding": "8.19.20",
              "versionStartIncluding": "8.19.0"
            },
            {
              "criteria": "cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8074255F-9652-4639-ADCE-EB00B95FC870",
              "versionEndExcluding": "9.4.5",
              "versionStartIncluding": "9.3.0"
            },
            {
              "criteria": "cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F1756783-CC37-488F-A612-4F3AF793F575",
              "versionEndExcluding": "9.5.1",
              "versionStartIncluding": "9.5.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@elastic.co"
}