CVE-2026-56151

MEDIUM

Improper Input Validation in Kibana Leading to Denial of Service

Title source: cna

Description

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.

References (1)

Core 1

Core References

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

Scores

CVSS v3 6.5

EPSS 0.0024

EPSS Percentile 15.6%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-20

Status published

Products (4)

Elastic/Kibana 8.0.0 - 8.19.16

elastic/kibana 8.0.0 - 8.19.17

Elastic/Kibana 9.0.0 - 9.3.5

Elastic/Kibana 9.4.0 - 9.4.2

Published Jul 01, 2026

Tracked Since Jul 01, 2026