FKIE_CVE-2026-63144

Vulnerability from fkie_nvd - Published: 2026-07-21 23:18 - Updated: 2026-10-24 17:10
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via a specially crafted search request submitted by a low-privileged authenticated user. A user with read-level index access can submit a request that triggers unbounded recursive processing within the Elasticsearch query evaluation component, causing a fatal error that terminates the affected node. In single-node deployments, this results in complete service outage; in multi-node clusters, it causes repeated node restarts and sustained availability degradation.
References
security@elastic.cohttps://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-68/388571Vendor Advisory
Impacted products
Vendor Product Version
elastic elasticsearch *
elastic elasticsearch *
elastic elasticsearch *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Elasticsearch",
          "vendor": "Elastic",
          "versions": [
            {
              "lessThanOrEqual": "9.4.3",
              "status": "affected",
              "version": "9.4.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.3.7",
              "status": "affected",
              "version": "9.3.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.19.18",
              "status": "affected",
              "version": "8.19.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@elastic.co"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B6FF2B4B-ED0E-40D0-974A-CC3F6967BDC3",
              "versionEndExcluding": "8.19.19",
              "versionStartIncluding": "8.19.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "700D3B63-7050-4288-A12F-1325B5C808E5",
              "versionEndExcluding": "9.3.8",
              "versionStartIncluding": "9.3.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "54F14824-0093-4DA8-95AD-ED8F481722FC",
              "versionEndExcluding": "9.4.4",
              "versionStartIncluding": "9.4.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Uncontrolled Recursion (CWE-674) in Elasticsearch can lead to denial of service via a specially crafted search request submitted by a low-privileged authenticated user. A user with read-level index access can submit a request that triggers unbounded recursive processing within the Elasticsearch query evaluation component, causing a fatal error that terminates the affected node. In single-node deployments, this results in complete service outage; in multi-node clusters, it causes repeated node restarts and sustained availability degradation."
    },
    {
      "lang": "es",
      "value": "Recursi\u00f3n Incontrolada (CWE-674) en Elasticsearch puede llevar a una denegaci\u00f3n de servicio a trav\u00e9s de una solicitud de b\u00fasqueda especialmente dise\u00f1ada enviada por un usuario autenticado con privilegios bajos. Un usuario con acceso de lectura al \u00edndice puede enviar una solicitud que desencadena un procesamiento recursivo ilimitado dentro del componente de evaluaci\u00f3n de consultas de Elasticsearch, causando un error fatal que termina el nodo afectado. En implementaciones de un solo nodo, esto resulta en una interrupci\u00f3n completa del servicio; en cl\u00fasteres de varios nodos, causa reinicios repetidos de nodos y una degradaci\u00f3n sostenida de la disponibilidad."
    }
  ],
  "id": "CVE-2026-63144",
  "lastModified": "2026-10-24T17:10:00.220",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "security@elastic.co",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-63144",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-22T13:23:19.625583Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-21T23:18:02.343",
  "references": [
    {
      "source": "security@elastic.co",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-68/388571"
    }
  ],
  "sourceIdentifier": "security@elastic.co",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-674"
        }
      ],
      "source": "security@elastic.co",
      "type": "Secondary"
    }
  ]
}



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