---
id: CVE-2026-63136
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 user with search
  privileges can submit a specially crafted search request that causes a data
  node to exhau…
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, < 8.19.15'
  - 'elasticsearch >= 9.0.0, < 9.2.9'
  - 'elasticsearch >= 9.3.0, < 9.3.4'
patched:
  - elasticsearch 9.3.4
published: '2026-07-21'
updated: '2026-08-07'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63136'
references:
  - url: >-
      https://discuss.elastic.co/t/elasticsearch-8-19-15-9-2-9-9-3-4-security-update-esa-2026-60/388559
    label: security@elastic.co
tags:
  - nvd
epss: 0.0024
epssPercentile: 0.15415
ingestedAt: '2026-08-07T23:18:01.295Z'
---

## Overview

Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A user with search privileges can submit a specially crafted search request that causes a data node to exhaust available heap memory, resulting in node unavailability and cluster degradation. An attacker could leverage this vulnerability to cause cluster downtime requiring manual intervention to restore service.

## Affected

- `elasticsearch >= 8.0.0, < 8.19.15`
- `elasticsearch >= 9.0.0, < 9.2.9`
- `elasticsearch >= 9.3.0, < 9.3.4`

## Remediation

Upgrade past the affected range:

- `elasticsearch 9.3.4`