---
id: CVE-2026-56145
title: >-
  Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to
  denial of service via Excessive Allocation (CAPEC-130)
summary: >-
  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 co…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
vendor: elastic
product: elasticsearch
affected:
  - 'elasticsearch >= 8.0.0, < 8.19.18'
  - 'elasticsearch >= 9.0.0, < 9.3.7'
  - 'elasticsearch >= 9.4.0, < 9.4.4'
patched:
  - elasticsearch 9.4.4
published: '2026-07-21'
updated: '2026-08-07'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56145'
references:
  - url: >-
      https://discuss.elastic.co/t/elasticsearch-8-19-18-9-3-7-9-4-4-security-update-esa-2026-57/388556
    label: security@elastic.co
tags:
  - nvd
epss: 0.00332
epssPercentile: 0.26666
ingestedAt: '2026-08-07T22:17:38.407Z'
---

## Overview

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.

## Affected

- `elasticsearch >= 8.0.0, < 8.19.18`
- `elasticsearch >= 9.0.0, < 9.3.7`
- `elasticsearch >= 9.4.0, < 9.4.4`

## Remediation

Upgrade past the affected range:

- `elasticsearch 9.4.4`