CVE-2026-103005 MEDIUM

CVE-2026-103005: Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service

Vendor Elastic
Product Elasticsearch
Weakness CWE-789
Published October 6, 2026
Last update October 6, 2026

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

October 6, 2026 CVE published
October 6, 2026 Record updated