CVE-2026-102404
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 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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Elasticsearch
PublishedOct 6, 2026
First seenOct 6, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- elastic elasticsearch8.19.23, 9.4.8, 9.5.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| elastic elasticsearch | 8.0.0 ≤ v < 8.19.23, 9.0.0 ≤ v < 9.4.8, 9.5.0 ≤ v < 9.5.5 | 8.19.23, 9.4.8, 9.5.5 |
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