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VULNERABILITIES

CVE-2026-72656 Details

Description

Memory Allocation with Excessive Size Value (CWE-789) in the ES|QL query processing of Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user able to submit ES|QL queries could send a specially crafted query whose evaluation allocates an unbounded amount of heap memory, exhausting the available heap on the receiving node and causing the node to become unavailable.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://discuss.elastic.co/t/elasticsearch-8-18-0-9-0-0-security-update-esa-2026-111/389495 [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-789Memory Allocation with Excessive Size Value[email protected]

Affected Products

ProductVersions
elastic elasticsearch
>= 8.11.0, < 8.18.0

CPE

  • cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-72656
NVD Published Date:
Aug 13, 2026
NVD Last Modified:
Sep 4, 2026
Source:
[email protected]
CVE-2026-72656 Details - Not Deferred