{"id":"CVE-2018-17244","details":"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.","aliases":["GHSA-vpqm-88c4-x4cv"],"modified":"2026-07-08T17:16:08.573402Z","published":"2018-12-20T22:29:00.240Z","references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/106318"},{"type":"ADVISORY","url":"https://discuss.elastic.co/t/elastic-stack-6-4-3-and-5-6-13-security-update/155594"},{"type":"ADVISORY","url":"https://www.elastic.co/community/security"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/elastic/elasticsearch","events":[{"introduced":"595516e45d054483dcdaf12f0468a59cb34bb568"},{"last_affected":"04711c21227efda954d15c23857ad04b9f669076"}],"database_specific":{"cpe":"cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*","extracted_events":[{"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"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}