{"id":"CVE-2018-17244","aliases":["GHSA-vpqm-88c4-x4cv"],"url":"https://o3.security/vulnerability/CVE-2018-17244","summary":"Exposure of Sensitive Information to an Unauthorized Actor in Elasticsearch","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.","published":"2018-12-20T22:29:00.240Z","modified":"2026-07-08T17:16:08.573402Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.elasticsearch:elasticsearch","fixedVersion":"6.4.3"}],"fix":null,"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"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2018-17244"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T17:16:08.573402Z"}}