CVE-2026-63263 – Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service

CVE ID :CVE-2026-63263

Published : July 22, 2026, 12:17 a.m. | 1 hour, 27 minutes ago

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.

Severity: 6.5 | MEDIUM

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