CVE-2026-102404 — Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Elastic / Elasticsearch	affected 8.0.0 through 8.19.22; affected 9.0.0 through 9.4.7; affected 9.5.0 through 9.5.4

CWE

CWE-400

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.