---
id: CVE-2026-103005
title: >-
  Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can
  lead to denial of service via Excessive Allocation (CAPEC-130)
summary: >-
  Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can
  lead to denial of service via Excessive Allocation (CAPEC-130). An
  authenticated user with connector management privileges could cause the
  cluster to allocate an …
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-789
vendor: Elastic
product: Elasticsearch
affected:
  - Elasticsearch >= 8.12.0 <= 8.19.22
  - Elasticsearch >= 9.0.0 <= 9.3.8
  - Elasticsearch >= 9.4.0 <= 9.4.7
  - Elasticsearch >= 9.5.0 <= 9.5.4
published: '2026-10-06'
updated: '2026-10-06'
sourceUpdated: '2026-10-06T20:17:13.597'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103005'
references:
  - url: >-
      https://discuss.elastic.co/t/elasticsearch-8-19-23-9-4-8-9-5-5-security-update-esa-2026-195/390869
    label: security@elastic.co
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-06T19:53:36.232961Z'
ingestedAt: '2026-10-06T20:16:42.473Z'
---

## Overview

Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user with connector management privileges could cause the cluster to allocate an uncontrolled amount of memory when connector resources with an excessively large `description` field are created and subsequently accessed, exhausting available heap memory and crashing the affected node.

## Remediation

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