Kibana Resource Exhaustion via Authenticated Compressed Payload
CVE-2026-42400 Published on May 28, 2026
Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
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.
Vulnerability Analysis
CVE-2026-42400 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2026-42400 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-42400
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Affected Versions
Elastic Kibana:- Version 9.4.0, <= 9.4.1 is affected.
- Version 9.0.0, <= 9.3.4 is affected.
- Version 8.0.0, <= 8.19.15 is affected.