---
id: CVE-2026-102404
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 can submit a specially crafted query that causes
  uncontrolled memory gro…
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 <= 8.19.22
  - Elasticsearch >= 9.0.0 <= 9.4.7
  - Elasticsearch >= 9.5.0 <= 9.5.4
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T20:17:12.333'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102404'
references:
  - url: >-
      https://discuss.elastic.co/t/elasticsearch-8-19-23-9-4-8-9-5-5-security-update-esa-2026-185/390859
    label: security@elastic.co
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-06T19:57:13.886439Z'
ingestedAt: '2026-10-06T20:16:42.470Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.