CVE-2026-78601: Missing Authorization in Kibana Leading to Unauthorized Elasticsearch Index Data Exposure
Missing Authorization (CWE-862) in Kibana can lead to information disclosure via Privilege Abuse (CAPEC-122). An authorization control was not applied to a Kibana Entity Store configuration operation, allowing an authenticated user with elevated Kibana privileges to indirectly cause a background task to read from Elasticsearch indices that user is not authorized to access. Derived entity data from those indices is then exposed through the entity store output.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker must be authenticated to Kibana and have elevated Kibana privileges. The issue is caused by a missing authorization check on an Entity Store configuration operation.
What access can be exposed?
The attacker can cause a background task to read Elasticsearch indices they are not authorized to access. Derived entity data from those indices may then be exposed through Entity Store output.
Is this limited to direct Elasticsearch access?
No. The exposure occurs indirectly through Kibana's Entity Store and its background task, rather than by granting the user direct authorization to the protected Elasticsearch indices.