CVE-2026-72656
Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service
- State
- Published
- Severity
- 6.5 Medium
- Published
- Aug 13, 2026
- Updated
- Aug 13, 2026
- Reserved
- Aug 10, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | elastic |
Weaknesses
- CWE-789 Memory Allocation with Excessive Size Value
Affected Products
| Product | Versions |
|---|---|
ElasticsearchElastic |
|
References
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