CVE-2026-102404

Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service

State: Published
Severity: 6.5 Medium
Published: Oct 6, 2026
Updated: Oct 6, 2026
Reserved: Sep 29, 2026

Description

Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A low-privileged authenticated user can submit a specially crafted query that causes uncontrolled memory growth in the query processing engine, resulting in an out-of-memory condition that terminates the Elasticsearch node. The condition can be triggered repeatedly, including by queries embedded in shared resources, causing persistent cluster unavailability.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	elastic

Weaknesses

CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
ElasticsearchElastic	8.0.0 through 8.19.22Affected 9.0.0 through 9.4.7Affected 9.5.0 through 9.5.4Affected

References

https://discuss.elastic.co/t/elasticsearch-8-19-23-9-4-8-9-5-5-security-update-esa-2026-185/390859

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