CVE-2026-63136

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.

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-25)

CWE

CWE-400

Published

2026-07-21

Modified

2026-10-24

Record from

the NVD, synced 2026-10-25

Affected

• elastic:elasticsearch

References

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

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