{"id":"CVE-2026-63263","state":"PUBLISHED","title":"Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service","description":"Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Exponential Data Expansion (CAPEC-197). An authenticated user may submit a specially crafted query to the ES|QL engine that causes exponential CPU consumption during query evaluation. Because the resource exhaustion persists beyond query completion, repeated requests can fully exhaust the available query worker resources, rendering ES|QL queries unavailable until the node is restarted.","publishedAt":"2026-07-21T23:10:49.155Z","updatedAt":"2026-07-22T13:07:01.561Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"elastic"},"assigner":"elastic","products":["Elastic Elasticsearch"],"affected":[{"vendor":"Elastic","product":"Elasticsearch","defaultStatus":"unaffected","versions":[{"version":"9.4.0","status":"affected","lessThanOrEqual":"9.4.3","versionType":"semver"},{"version":"9.0.0","status":"affected","lessThanOrEqual":"9.3.7","versionType":"semver"},{"version":"8.0.0","status":"affected","lessThanOrEqual":"8.19.18","versionType":"semver"}]}],"references":["https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-74/388577"],"weaknesses":["CWE-400"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63263.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63263","state":"PUBLISHED","datePublished":"2026-07-21T23:10:49.155Z","dateUpdated":"2026-07-22T13:07:01.561Z","assignerShortName":"elastic","assignerOrgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","dateReserved":"2026-07-16T03:26:51.579Z"},"containers":{"cna":{"title":"Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service","descriptions":[{"lang":"en","value":"Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Exponential Data Expansion (CAPEC-197). An authenticated user may submit a specially crafted query to the ES|QL engine that causes exponential CPU consumption during query evaluation. Because the resource exhaustion persists beyond query completion, repeated requests can fully exhaust the available query worker resources, rendering ES|QL queries unavailable until the node is restarted."}],"affected":[{"vendor":"Elastic","product":"Elasticsearch","defaultStatus":"unaffected","versions":[{"version":"9.4.0","status":"affected","lessThanOrEqual":"9.4.3","versionType":"semver"},{"version":"9.0.0","status":"affected","lessThanOrEqual":"9.3.7","versionType":"semver"},{"version":"8.0.0","status":"affected","lessThanOrEqual":"8.19.18","versionType":"semver"}]}],"references":[{"url":"https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-74/388577"}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseSeverity":"MEDIUM","baseScore":6.5,"confidentialityImpact":"NONE","integrityImpact":"NONE","scope":"UNCHANGED","userInteraction":"NONE","privilegesRequired":"LOW","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","description":"CWE-400 Uncontrolled Resource Consumption","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"elastic","orgId":"271b6943-45a9-4f3a-ab4e-976f3fa05b5a","dateUpdated":"2026-07-21T23:10:49.155Z"},"impacts":[{"capecId":"CAPEC-197","descriptions":[{"lang":"en","value":"CAPEC-197 Exponential Data Expansion"}]}],"source":{"discovery":"Elastic"},"x_generator":{"engine":"Elastic CVE Publisher 0.0.1"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-22T13:04:18.223493Z","id":"CVE-2026-63263","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-22T13:07:01.561Z"}}]}}}