{"id":"BIT-elasticsearch-2026-72656","summary":"Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service","details":"Memory Allocation with Excessive Size Value (CWE-789) in the ES|QL query processing of Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user able to submit ES|QL queries could send a specially crafted query whose evaluation allocates an unbounded amount of heap memory, exhausting the available heap on the receiving node and causing the node to become unavailable.","aliases":["CVE-2026-72656"],"modified":"2026-09-08T08:47:15.711111775Z","published":"2026-08-19T08:39:43.724Z","database_specific":{"severity":"Medium","cpes":["cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*","cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:maven:*:*"]},"references":[{"type":"ADVISORY","url":"https://discuss.elastic.co/t/elasticsearch-8-18-0-9-0-0-security-update-esa-2026-111/389495"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72656"}],"affected":[{"package":{"name":"elasticsearch","ecosystem":"Bitnami","purl":"pkg:bitnami/elasticsearch"},"ranges":[{"type":"SEMVER","events":[{"introduced":"8.11.0"},{"fixed":"8.17.10"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/elasticsearch/BIT-elasticsearch-2026-72656.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}],"schema_version":"1.9.0"}