CVE-2026-72643

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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://discuss.elastic.co/t/kibana-9-4-5-9-5-1-security-update-esa-2026-124/389538	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:elastic:kibana::::::::
	cpe:2.3:a:elastic:kibana:9.5.0:::::::*

History

No history.

Information

Published : 2026-08-13 20:17

Updated : 2026-09-03 18:56

NVD link : CVE-2026-72643

Mitre link : CVE-2026-72643

CVE.ORG link : CVE-2026-72643

JSON object : View

Products Affected

elastic

kibana

CWE

CWE-863

Incorrect Authorization

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