CVE-2026-56145

MEDIUM

Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service

Title source: cna

Description

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.

References (1)

Core 1

Core References

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

Scores

CVSS v3 6.5

EPSS 0.0029

EPSS Percentile 21.2%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-400

Status published

Products (3)

Elastic/Elasticsearch 8.0.0 - 8.19.17

Elastic/Elasticsearch 9.0.0 - 9.3.6

Elastic/Elasticsearch 9.4.0 - 9.4.3

Published Jul 21, 2026

Tracked Since Jul 22, 2026