CVE-2026-42400 — Uncontrolled Resource Consumption in Kibana Leading to Denial of Service

CVE-2026-42400

Uncontrolled Resource Consumption in Kibana Leading to Denial of Service PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
Elastic / Kibana	affected 9.4.0 through 9.4.1; affected 9.0.0 through 9.3.4; affected 8.0.0 through 8.19.15

CWE

CWE-400

References

https://discuss.elastic.co/t/kibana-8-19-16-9-3-5-9-4-2-security-update-esa-2026-35/386554

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.