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Vulnerabilities CVE-2026-72656

CVE-2026-72656

Medium
Open
TLP:CLEAR

Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service

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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.

Details

CVSS Score
6.5
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Aug 13, 2026
Last Modified
Aug 13, 2026
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