Bug 2449144 (CVE-2026-26939)

Summary: CVE-2026-26939 Kibana: Kibana: Unauthorized system control via missing authorization
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: jcantril, rojacob
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Kibana. An authenticated attacker with rule management privileges could exploit a missing authorization vulnerability in the server-side Detection Rule Management. This allows the attacker to configure unauthorized endpoint response actions, such as host isolation, process termination, and process suspension. This could lead to a denial of service or impact on system integrity.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-03-19 18:02:59 UTC
Missing Authorization (CWE-862) in Kibana’s server-side Detection Rule Management can lead to Unauthorized Endpoint Response Action Configuration (host isolation, process termination, and process suspension) via CAPEC-1 (Accessing Functionality Not Properly Constrained by ACLs). This requires an authenticated attacker with rule management privileges.