Security advisory

{
  "id": "e3355e16d9b40e49d7264787ff8b8aae44d9b4e7511241d0ed9b8583792f644a",
  "url": "https://osv.dev/vulnerability/CVE-2018-17244",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-17244",
    "summary": "Elasticsearch Security versions 6.4.0 to 6.4.2 contain an error in the way request headers are applied to requests when using the Active Directory, LDAP, Native, or File realms. A request may receive headers intended for another request if the same username is being authenticated concurrently; when used with run as, this can result in the request running as the incorrect user. This could allow a user to access information that they should not have access to.",
    "evidence": "osv:CVE-2018-17244",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2018-17244",
      "aliases": [
        "CVE-2018-17244",
        "GHSA-vpqm-88c4-x4cv"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/elastic/elasticsearch",
              "type": "GIT",
              "events": [
                {
                  "introduced": "595516e45d054483dcdaf12f0468a59cb34bb568"
                },
                {
                  "last_affected": "04711c21227efda954d15c23857ad04b9f669076"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "6.4.0"
                      },
                      {
                        "last_affected": "6.4.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v6.4.2",
            "v6.4.1",
            "v6.4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-17244.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:23.331362707Z",
      "provider": "osv",
      "references": [
        "https://discuss.elastic.co/t/elastic-stack-6-4-3-and-5-6-13-security-update/155594",
        "https://www.elastic.co/community/security"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-17244",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430891,
  "published_at": "2018-12-20T22:29:00.24+00:00"
}