CVE-2026-56145 PUBLISHED

Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service

Assigner: elastic
Reserved: 19.06.2026 Published: 21.07.2026 Updated: 21.07.2026

Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A low-privileged authenticated user with permission to execute EQL sequence queries against an index they control can send a specially crafted query that triggers excessive memory consumption, causing the Elasticsearch node to crash.

Metrics

CVSS 3.1

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

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Elastic
Product	Elasticsearch
Versions	Default: unaffected affected from 9.4.0 to 9.4.3 (incl.) affected from 8.0.0 to 8.19.17 (incl.) affected from 9.0.0 to 9.3.6 (incl.)

References

https://discuss.elastic.co/t/elasticsearch-8-19-18-9-3-7-9-4-4-security-update-esa-2026-57/388556

Problem Types

CWE-400 Uncontrolled Resource Consumption CWE

Impacts

CAPEC-130 Excessive Allocation