{"id":"BIT-elasticsearch-2026-72683","summary":"Uncontrolled Recursion in Elasticsearch Leading to Denial of Service","details":"A flaw in Elasticsearch allows an authenticated user with the privileges required to invoke the simulate pipeline API endpoint (https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-ingest-simulate) to submit a request that causes a self-referential data structure to be created. When a specific internal component later processes that structure, the operation recurses without bound and raises a fatal error that is not handled by the surrounding execution path, terminating the affected node process and resulting in a denial of service.","aliases":["CVE-2026-72683"],"modified":"2026-09-08T08:47:15.695203336Z","published":"2026-08-19T08:39:47.224Z","database_specific":{"cpes":["cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*","cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:maven:*:*"],"severity":"Medium"},"references":[{"type":"ADVISORY","url":"https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-75/389496"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72683"}],"affected":[{"package":{"name":"elasticsearch","ecosystem":"Bitnami","purl":"pkg:bitnami/elasticsearch"},"ranges":[{"type":"SEMVER","events":[{"introduced":"5.0.0"},{"fixed":"8.19.19"},{"introduced":"9.3.0"},{"fixed":"9.3.8"},{"introduced":"9.4.0"},{"fixed":"9.4.4"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/elasticsearch/BIT-elasticsearch-2026-72683.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"}