Uncontrolled Recursion in Elasticsearch Leading to Denial of Service

{
  "id": "049c62626860f1570afec7529bcfba8dbc8665e9695d937260c7953c49fdfc49",
  "url": "https://osv.dev/vulnerability/BIT-elasticsearch-2026-102409",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Uncontrolled Recursion in Elasticsearch Leading to Denial of Service",
    "summary": "Uncontrolled Recursion (CWE-674) in Elasticsearch can allow an authenticated user with low privileges to terminate an Elasticsearch node, resulting in denial of service, via Excessive Allocation (CAPEC-130).",
    "evidence": "osv:BIT-elasticsearch-2026-102409",
    "products": [
      {
        "name": {
          "value": "elasticsearch",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "9.4.8",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "9.5.5",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "BIT-elasticsearch-2026-102409",
      "aliases": [
        "BIT-elasticsearch-2026-102409",
        "CVE-2026-102409"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "9.2.0"
                },
                {
                  "fixed": "9.4.8"
                },
                {
                  "introduced": "9.5.0"
                },
                {
                  "fixed": "9.5.5"
                }
              ]
            }
          ],
          "package": {
            "name": "elasticsearch",
            "purl": "pkg:bitnami/elasticsearch",
            "ecosystem": "Bitnami"
          },
          "severity": [
            {
              "type": "CVSS_V3",
              "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
            }
          ],
          "database_specific": {
            "source": "https://github.com/bitnami/vulndb/tree/main/data/elasticsearch/BIT-elasticsearch-2026-102409.json"
          }
        }
      ],
      "modified": "2026-10-14T11:00:04.826802939Z",
      "provider": "osv",
      "references": [
        "https://discuss.elastic.co/t/elasticsearch-9-4-8-9-5-5-security-update-esa-2026-190/390863",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-102409"
      ],
      "provider_metadata": {
        "cpes": [
          "cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:maven:*:*"
        ],
        "severity": "Medium"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-102409",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 316151,
  "published_at": "2026-10-14T08:40:28.782+00:00"
}