CVE-2026-56151: CWE-20 Improper Input Validation in Elastic Kibana
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.
AI Analysis
Technical Summary
This vulnerability in Elastic Kibana arises from improper input validation (CWE-20) in the handling of Fleet policy inputs. An authenticated user can exploit this by submitting maliciously crafted input data, leading to denial of service conditions that impact Fleet agent, server, and policy management components. The issue affects Kibana versions 8.0.0, 9.0.0, and 9.4.0. There is no vendor-provided remediation or patch information at this time, and no known exploits have been reported in the wild.
Potential Impact
Successful exploitation results in denial of service (DoS) affecting Fleet agent, server, and policy management functionality within Kibana. This disrupts availability but does not impact confidentiality or integrity according to the CVSS vector. The vulnerability requires authenticated access and network attack vector.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict authenticated user permissions to trusted personnel only to reduce risk. Monitor vendor communications for updates on official patches or mitigations.
CVE-2026-56151: CWE-20 Improper Input Validation in Elastic Kibana
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.
CVSS v3.1
Score 6.5medium
Affected software
pkg:github/elastic/kibanaRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Elastic Kibana arises from improper input validation (CWE-20) in the handling of Fleet policy inputs. An authenticated user can exploit this by submitting maliciously crafted input data, leading to denial of service conditions that impact Fleet agent, server, and policy management components. The issue affects Kibana versions 8.0.0, 9.0.0, and 9.4.0. There is no vendor-provided remediation or patch information at this time, and no known exploits have been reported in the wild.
Potential Impact
Successful exploitation results in denial of service (DoS) affecting Fleet agent, server, and policy management functionality within Kibana. This disrupts availability but does not impact confidentiality or integrity according to the CVSS vector. The vulnerability requires authenticated access and network attack vector.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict authenticated user permissions to trusted personnel only to reduce risk. Monitor vendor communications for updates on official patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- elastic
- Date Reserved
- 2026-06-19T11:01:02.535Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a45492b27e9c79719d62124
Added to database: 07/01/2026, 17:06:51 UTC
Last enriched: 07/01/2026, 17:22:29 UTC
Last updated: 07/01/2026, 17:52:19 UTC
Views: 3
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