{"id":"CVE-2021-22144","aliases":["BIT-elasticsearch-2021-22144","GHSA-3393-hvrj-w7v3"],"url":"https://o3.security/vulnerability/CVE-2021-22144","summary":"Denial of Service in Elasticsearch","details":"In Elasticsearch versions before 7.13.3 and 6.8.17 an uncontrolled recursion vulnerability that could lead to a denial of service attack was identified in the Elasticsearch Grok parser. A user with the ability to submit arbitrary queries to Elasticsearch could create a malicious Grok query that will crash the Elasticsearch node.","published":"2021-07-26T12:15:08.547Z","modified":"2026-07-08T23:57:27.443583Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Maven","name":"org.elasticsearch:elasticsearch","fixedVersion":"6.8.17"},{"ecosystem":"Maven","name":"org.elasticsearch:elasticsearch","fixedVersion":"7.13.3"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://discuss.elastic.co/t/elasticsearch-7-13-3-and-6-8-17-security-update/278100"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210827-0006/"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuapr2022.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T23:57:27.443583Z"}}