Kibana Agent Builder Owner Mismatch Enables Unauthorized Agent Changes
CVE-2026-72643 Published on August 13, 2026
Incorrect Authorization in Kibana Agent Builder Leading to Disclosure and Tampering of Private Agents
Kibana Agent Builder determines whether a caller owns a private agent by comparing a stable user identifier when one is recorded, and falling back to a comparison of the username when it is not. A username is not unique across Elasticsearch authentication realms, so two distinct principals that share a username in different realms are treated as the same owner. This discloses the configuration and instructions of an agent the caller does not own, and allows that agent to be altered or removed.
Vulnerability Analysis
CVE-2026-72643 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, with no impact on 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-2026-72643 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-72643
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Affected Versions
Elastic Kibana:- Version 9.4.0, <= 9.4.4 is affected.
- Version 9.5.0 is affected.