{"id":"CVE-2026-56149","summary":"Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of Service","details":"Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to a denial of service via Excessive Allocation (CAPEC-130). A user with elevated privileges can submit a specially crafted machine learning request that causes excessive memory consumption, which may render the affected node unavailable.","aliases":["BIT-elasticsearch-2026-56149"],"modified":"2026-07-08T08:12:41.312077477Z","published":"2026-07-01T16:21:24.437Z","database_specific":{"cna_assigner":"elastic","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"9.4.0"},{"last_affected":"9.4.2"},{"introduced":"9.0.0"},{"last_affected":"9.3.5"},{"introduced":"8.0.0"},{"last_affected":"8.19.16"}]}],"cwe_ids":["CWE-770"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56149.json"},"references":[{"type":"WEB","url":"https://discuss.elastic.co/t/elasticsearch-8-19-17-9-3-6-9-4-3-security-update-esa-2026-43"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56149.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56149"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/elastic/elasticsearch","events":[{"introduced":"1b6a7ece17463df5ff54a3e1302d825889aa1161"},{"fixed":"402bbb9d596fffa14980c1dd23afca6c7c765908"},{"introduced":"112859b85d50de2a7e63f73c8fc70b99eea24291"},{"fixed":"1f1ab65304a7633cd6511a1fa2b65c914064e724"},{"introduced":"2e8528e92361c3399724226deaf2b46f933e925b"},{"fixed":"45f6a06b1b441b41fe711059b8720013173e7c89"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"8.0.0"},{"fixed":"8.19.17"},{"introduced":"9.0.0"},{"fixed":"9.3.6"},{"introduced":"9.4.0"},{"fixed":"9.4.3"}]}}],"versions":["v9.4.2","v9.4.1","v9.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56149.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"}]}