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6.5 Medium

CVE-2026-42400 Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130)

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.

Affected products and versions

Product Affected versions Fixed in
Kibana 9.4 9.4.0 → 9.4.1 No fix stated
Kibana 9.0 9.0.0 → 9.3.4 No fix stated
Kibana 8.0 8.0.0 → 8.19.15 No fix stated

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