Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service (CVE-2026-72656)
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.
Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service (CVE-2026-72656)
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.
Affected software
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Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-elasticsearch-2026-72656
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-72656"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- Medium
- Cvss Version
- null
Threat ID: 6a85b4b2acd9273b492514bd
Added to database: 08/19/2026, 13:50:42 UTC
Last updated: 08/19/2026, 13:50:42 UTC
Views: 1
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