CVE-2026-78606 is a vulnerability in Elastic Kibana
Published on September 1, 2026
Incorrect Authorization in Kibana Leading to Unauthorized Disclosure, Modification, and Deletion of Data
Incorrect Authorization (CWE-863) in Kibana can lead to unauthorized disclosure, modification, and deletion of data via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Where two authenticated principals originating from different authentication realms share the same username value, one could read, modify, and delete the other's private Elastic AI Assistant Knowledge Base entries.
Vulnerability Analysis
CVE-2026-78606 is exploitable with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2026-78606 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-78606
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Affected Versions
Elastic Kibana:- Version 8.19.11, <= 8.19.20 is affected.
- Version 9.3.0, <= 9.4.5 is affected.
- Version 9.5.0, <= 9.5.1 is affected.