---
id: CVE-2026-102411
title: >-
  Allocation of Resources Without Limits or Throttling (CWE-770) in
  Elasticsearch can lead to Denial of Service via Excessive Allocation
  (CAPEC-130)
summary: >-
  Allocation of Resources Without Limits or Throttling (CWE-770) in
  Elasticsearch can lead to Denial of Service via Excessive Allocation
  (CAPEC-130). Elasticsearch enforces a size limit on the user-supplied metadata
  field for each individu…
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-770
vendor: Elastic
product: Elasticsearch
affected:
  - Elasticsearch >= 8.0.0 <= 8.19.22
  - Elasticsearch >= 9.0.0 <= 9.4.6
  - Elasticsearch >= 9.5.0 <= 9.5.2
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T20:17:13.180'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102411'
references:
  - url: >-
      https://discuss.elastic.co/t/elasticsearch-9-4-7-9-5-3-8-19-23-security-update-esa-2026-192/390865
    label: security@elastic.co
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-06T19:54:47.882698Z'
ingestedAt: '2026-10-06T20:16:42.470Z'
---

## Overview

Allocation of Resources Without Limits or Throttling (CWE-770) in Elasticsearch can lead to Denial of Service via Excessive Allocation (CAPEC-130). Elasticsearch enforces a size limit on the user-supplied metadata field for each individual template resource, but does not limit the total memory used when multiple such resources are retrieved together. A user holding the *manage_index_templates* cluster privilege can register multiple resources each within the individual limit. Retrieving them together materializes all of their metadata values in memory at once, exhausting available heap and causing the affected node to fail with an out-of-memory error, resulting in a denial of service.

## Remediation

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