CVE-2026-103005

Published: Oct 6, 2026Modified: Oct 9, 2026

6.5

Vector

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

Exploitability: 2.8 / Impact: 3.6

Source: security@elastic.co (Secondary)

Description

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.

Affected (4)

Products: Elastic: Elasticsearch

Elastic

1 product

Elasticsearch

Configuration A

4 vulnerable

Vulnerable Software	Affected Versions
Elastic Elasticsearch	8.12.0 ≤ version < 8.19.23
Elastic Elasticsearch	9.0.0 ≤ version ≤ 9.3.8
Elastic Elasticsearch	9.4.0 ≤ version < 9.4.8
Elastic Elasticsearch	9.5.0 ≤ version < 9.5.5

Related CWEs

CWE-789

Memory Allocation with Excessive Size Value

The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.

References (1)

https://discuss.elastic.co/t/elasticsearch-8-19-23-9-4-8-9-5-5-security-update-esa-2026-195/390869

Source: security@elastic.co

Vendor Advisory

Timeline

No history available yet.