Authorization bypass through user-controlled key in Kibana - CVE-2026-72680
Published: August 13, 2026
Vulnerability identifier: #VU142335
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-72680
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to modify another user's conversation data.
The vulnerability exists due to authorization bypass through user-controlled key in the Kibana Agent Builder A2A JSON-RPC API endpoint when deriving a stored conversation identifier from user-supplied input. A remote user can supply an identifier already in use by another user to modify another user's conversation data.
Only conversations created through the agent-to-agent interface are affected, and exploitation requires knowledge of or prior sharing of the target conversation identifier within the same space.
Affected software
Kibana
How to mitigate CVE-2026-72680
Install security update from vendor's website.
Kibana - update to 9.4.5