Bug 2547107 (CVE-2026-102404)

Summary: CVE-2026-102404 elasticsearch: Elasticsearch: Denial of Service via uncontrolled memory consumption from crafted queries
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: 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 remote attacker with low privileges can submit a specially crafted query to the query processing engine, triggering excessive memory allocation. This uncontrolled memory growth leads to an out-of-memory crash that terminates the service node, resulting in a Denial of Service (DoS) and cluster unavailability.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2547787, 2547789, 2547788    
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Description OSIDB Bzimport 2026-10-06 19:53:15 UTC
Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A low-privileged authenticated user can submit a specially crafted query that causes uncontrolled memory growth in the query processing engine, resulting in an out-of-memory condition that terminates the Elasticsearch node. The condition can be triggered repeatedly, including by queries embedded in shared resources, causing persistent cluster unavailability.