CVE-2026-63136 — Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service

CVE-2026-63136

Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service PUBLISHED

Description (CNA)

Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A user with search privileges can submit a specially crafted search request that causes a data node to exhaust available heap memory, resulting in node unavailability and cluster degradation. An attacker could leverage this vulnerability to cause cluster downtime requiring manual intervention to restore service.

Affected (CNA)

Vendor / product	Versions
Elastic / Elasticsearch	affected 8.0.0 through 8.19.14; affected 9.3.0 through 9.3.3; affected 9.0.0 through 9.2.8

CWE

CWE-400

References

https://discuss.elastic.co/t/elasticsearch-8-19-15-9-2-9-9-3-4-security-update-esa-2026-60/388559

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.