Advisoriesby IbisElasticCVE-2026-63263
Elasticsearch: resource exhaustion
No fix yet
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Elasticsearch Product | >= 9.4.0, <= 9.4.3 | No fix yet |
| >= 9.0.0, <= 9.3.7 | No fix yet | |
| >= 8.0.0, <= 8.19.18 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-400