CVE-2026-78583: Kibana Privilege Escalation via Unvalidated Agent Credentials
CVE-2026-78583 Published on September 3, 2026
Incorrect Authorization in Kibana Leading to Privilege Escalation
Incorrect Authorization (CWE-863) in Kibana can lead to privilege escalation via Input Data Manipulation (CAPEC-153). Elasticsearch cluster privilege declarations originating from integration packages were not validated before being used to mint credentials for enrolled Elastic Agents. A user holding Fleet management privileges could therefore cause every Elastic Agent on a targeted policy to receive a credential carrying arbitrarily elevated Elasticsearch cluster privileges, up to and including full cluster administration.
Vulnerability Analysis
CVE-2026-78583 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 a high 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-2026-78583 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-78583
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Affected Versions
Elastic Kibana:- Version 8.0.0, <= 8.19.20 is affected.
- Version 9.0.0, <= 9.4.5 is affected.
- Version 9.5.0, <= 9.5.2 is affected.