---
id: CVE-2026-102409
title: >-
  Uncontrolled Recursion (CWE-674) in Elasticsearch can allow an authenticated
  user with low privileges to terminate an Elasticsearch node, resulting in
  denial of service, via Excessive Allocation (CAPEC-130).
summary: >-
  Uncontrolled Recursion (CWE-674) in Elasticsearch can allow an authenticated
  user with low privileges to terminate an Elasticsearch node, resulting in
  denial of service, via Excessive Allocation (CAPEC-130).
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-674
vendor: elastic
product: elasticsearch
affected:
  - 'elasticsearch >= 9.2.0, < 9.4.8'
  - 'elasticsearch >= 9.5.0, < 9.5.5'
patched:
  - elasticsearch 9.5.5
published: '2026-10-06'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T18:40:20.810'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102409'
references:
  - url: >-
      https://discuss.elastic.co/t/elasticsearch-9-4-8-9-5-5-security-update-esa-2026-190/390863
    label: security@elastic.co
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102409.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-102409'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-102409'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00309
epssPercentile: 0.23626
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-06T19:55:32.046618Z'
ingestedAt: '2026-10-06T20:16:42.468Z'
---

## Overview

Uncontrolled Recursion (CWE-674) in Elasticsearch can allow an authenticated user with low privileges to terminate an Elasticsearch node, resulting in denial of service, via Excessive Allocation (CAPEC-130).

## Affected

- `elasticsearch >= 9.2.0, < 9.4.8`
- `elasticsearch >= 9.5.0, < 9.5.5`

## Remediation

Upgrade past the affected range:

- `elasticsearch 9.5.5`

## Vendor advisories

- **Red Hat VEX** · updated 2026-10-06 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102409.json)