CVE-2026-42400
Uncontrolled Resource Consumption in Kibana Leading to Denial of Service
6.5
MEDIUM
CVSS 3.1
EPSS 0.05%
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.
How to fix CVE-2026-42400
To remediate CVE-2026-42400, upgrade the affected package to a fixed version below.
- —upgrade to 8.19.16 or later
- —upgrade to 8.19.16 or later
Is CVE-2026-42400 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 8.0.0, < 8.19.16, >= 9.0.0, < 9.3.5, >= 9.4.0, < 9.4.2
- >= 8.0.0, < 8.19.16, >= 9.0.0, < 9.3.5, >= 9.4.0, < 9.4.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |