CVE-2026-42400 Details
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.
A denial-of-service vulnerability has been identified in Kibana versions 8.0.0 prior to 8.19.15 and 9.0.0 prior to 9.3.4 and 9.4.0 prior to 9.4.1. This vulnerability allows an authenticated user to send a specially crafted compressed request payload that is processed before authorization checks. The result is excessive consumption of memory and CPU resources, causing the Kibana instance to become unresponsive or crash.
Users can upgrade to Kibana versions 8.19.16, 9.3.5, or 9.4.2 to address this vulnerability. For those unable to upgrade, no workarounds are available.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 29, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://discuss.elastic.co/t/kibana-8-19-16-9-3-5-9-4-2-security-update-esa-2026-35/386554 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| elastic kibana | >= 8.0.0, < 8.19.16 >= 9.0.0, < 9.3.5 >= 9.4.0, < 9.4.2 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 1, 2026 | Initial Analysis | [email protected] |
| May 28, 2026 | New CVE Received | [email protected] |