CVE-2026-72680

Kibana Agent Builder A2A JSON-RPC API endpoint derives the identifier of a stored conversation from a user-supplied input, and the ownership check on that identifier does not distinguish between a conversation that does not exist and one that exists but belongs to another user. As a result, an authenticated user holding only the Agent Builder read privilege can supply an identifier already in use by another user in the same space and cause that user's conversation to be replaced and reassigned to the requesting account. The original owner permanently loses access to the conversation and its history. The impact is limited to loss of integrity and availability of the affected conversation; the attacker does not read the overwritten content.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://discuss.elastic.co/t/kibana-9-4-5-security-update-esa-2026-82/389535	Vendor Advisory Mitigation

Configurations

Configuration 1 (hide)

cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-08-13 20:17

Updated : 2026-09-03 18:59

NVD link : CVE-2026-72680

Mitre link : CVE-2026-72680

CVE.ORG link : CVE-2026-72680

JSON object : View

Products Affected

elastic

kibana

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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