Kibana Improper Input Validation Allows Authenticated DoS
CVE-2026-56151 Published on July 1, 2026
Improper Input Validation in Kibana Leading to Denial of Service
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.
Vulnerability Analysis
CVE-2026-56151 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2026-56151
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Affected Versions
Elastic Kibana:- Version 9.0.0, <= 9.3.5 is affected.
- Version 8.0.0, <= 8.19.16 is affected.
- Version 9.4.0, <= 9.4.2 is affected.