Missing Authorization in Kibana Leading to Unauthorized Disclosure of Fleet Deployment Metadata
Missing Authorization (CWE-862) in Kibana can lead to information disclosure via Exploiting Incorrectly Configured Access Control Security Levels (CAPEC-180). An authenticated user holding minimal Elasticsearch privileges could bypass Kibana feature authorization and space access controls, resulting in the unauthorized disclosure of Fleet deployment metadata from the default Kibana space.
Affected Versions:
- 9.x:
- All versions from 9.0.0 up to and including 9.4.5
- Version 9.5.0
Versions prior to 9.0.0, including all 8.x releases, are not affected because the affected functionality did not exist.
Affected Configurations:
Kibana deployments with native agentless connector infrastructure configured and active Fleet policies present in the default Kibana space.
Solutions and Mitigations:
The issue is resolved in Kibana versions 9.4.6 and 9.5.1.
For Users that Cannot Upgrade:
There are no workarounds for this vulnerability.
Indicators of Compromise (IOC)
No specific indicators of compromise have been identified for this vulnerability.
Elastic Cloud Serverless
Due to our continuous deployment and patching model, the vulnerability described in this security advisory was remediated in our Elastic Cloud Serverless offering before the public disclosure.
Severity: CVSSv3.1: Medium ( 4.3 ) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVE ID: CVE-2026-78603
Problem Type: CWE-862 - Missing Authorization
Impact: CAPEC-180 - Exploiting Incorrectly Configured Access Control Security Levels