CVE-2026-56151 — Improper Input Validation in Kibana Leading to Denial of Service

CVE-2026-56151

Improper Input Validation in Kibana Leading to Denial of Service PUBLISHED

Description (CNA)

Improper Input Validation (CWE-20) in Kibana can lead to a denial of service via Input Data Manipulation (CAPEC-153). An authenticated user can submit a specially crafted Fleet policy input that is not correctly validated, which can render Fleet agent, server, and policy management functionality unavailable.

Affected (CNA)

Vendor / product	Versions
Elastic / Kibana	affected 9.0.0 through 9.3.5; affected 8.0.0 through 8.19.16; affected 9.4.0 through 9.4.2

CWE

CWE-20

References

https://discuss.elastic.co/t/kibana-8-19-17-9-3-6-9-4-3-security-update-esa-2026-45

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.