Auth bypass in Elastic Kibana
CVE-2026-72666
Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to unauthorized query execution against Elastic Agents that are assigned to a Kibana space the requesting user has no access to, via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). A user who is authorized to run Osquery live queries in one space can have a query carried out on hosts belonging to another space, resulting in disclosure of information from those hosts to the Osquery results data stream.
Vulnerability class: IDOR (Insecure Direct Object Reference)
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Elastic Kibana — versions 9.1.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-72666?
- CVE-2026-72666 is a medium-severity vulnerability in Elastic Kibana, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.8/10. Published 2026-08-13.
- How severe is CVE-2026-72666?
- Medium severity. CVSS v3 base score is 6.8 out of 10.