CVE-2026-56145
Medium
Description
Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A low-privileged authenticated user with permission to execute EQL sequence queries against an index they control can send a specially crafted query that triggers excessive memory consumption, causing the Elasticsearch node to crash.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Elasticsearch
PublishedJul 21, 2026
First seenJul 21, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- elastic elasticsearch8.19.18, 9.3.7, 9.4.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| elastic elasticsearch | 8.0.0 ≤ v < 8.19.18, 9.0.0 ≤ v < 9.3.7, 9.4.0 ≤ v < 9.4.4 | 8.19.18, 9.3.7, 9.4.4 |
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