CVE-2026-42400
Medium
Description
Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user can send a specially crafted compressed request payload that is processed prior to authorization checks, causing excessive memory and CPU resource consumption that can result in a Kibana instance becoming unresponsive or crashing.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Elastic Kibana
PublishedMay 28, 2026
First seenMay 28, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- elastic kibana8.19.16, 9.3.5, 9.4.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| elastic kibana | 8.0.0 ≤ v < 8.19.16, 9.0.0 ≤ v < 9.3.5, 9.4.0 ≤ v < 9.4.2 | 8.19.16, 9.3.5, 9.4.2 |
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