CVE-2026-63263

published 2026-07-22

CVE-2026-63263: Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Exponential Data Expansion (CAPEC-197). An authenticated user…

Priority P3 35 medium 6.5 CVSS 3.1

AV N AC L PR L UI N S U C N I N A H

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

6 ranges

Vendor	Product	Version range	Fixed in
elastic	elasticsearch	>= 8.0.0 < 8.19.19	8.19.19
elastic	elasticsearch	8.0.0 – 8.19.18	—
elastic	elasticsearch	>= 9.0.0 < 9.3.8	9.3.8
elastic	elasticsearch	9.0.0 – 9.3.7	—
elastic	elasticsearch	>= 9.4.0 < 9.4.4	9.4.4
elastic	elasticsearch	9.4.0 – 9.4.3	—

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CWE-400