Bug 2515553 (CVE-2026-72656)

Summary: CVE-2026-72656 elasticsearch: Elasticsearch: Denial of Service via excessive memory allocation in ES|QL queries
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerability-draftAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: aruklets, doconnor
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Elasticsearch. An authenticated user, by submitting a specially crafted ES|QL query, could trigger an unbounded allocation of heap memory. This excessive memory consumption exhausts the available resources on the receiving node, leading to a denial of service (DoS) condition where the node becomes unavailable.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-08-13 19:33:25 UTC
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.