CVE-2026-42400: 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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-42400?
The severity of CVE-2026-42400 is medium with a score of 6.5.
What is the impact of CVE-2026-42400?
CVE-2026-42400 can lead to denial of service due to uncontrolled resource consumption.
How do I fix CVE-2026-42400?
To fix CVE-2026-42400, you should update your Elastic Kibana to the latest patched version.
Who is affected by CVE-2026-42400?
Authenticated users of Elastic Kibana are potentially affected by CVE-2026-42400.
What type of vulnerability is CVE-2026-42400?
CVE-2026-42400 is classified as an uncontrolled resource consumption vulnerability.