CVE-2026-72666: CWE-639 Authorization Bypass Through User-Controlled Key in Elastic Kibana
CVE-2026-72666 is an authorization bypass vulnerability in Elastic Kibana version 9.1.0. It allows a user authorized to run Osquery live queries in one Kibana space to execute queries on Elastic Agents assigned to other spaces they do not have access to. This results in unauthorized disclosure of information from hosts in those other spaces. The vulnerability is due to improper access control enforcement (CWE-639).
AI Analysis
Technical Summary
This vulnerability in Kibana (CVE-2026-72666) involves an authorization bypass through a user-controlled key, classified under CWE-639. Specifically, it allows a user with permission to run Osquery live queries in one Kibana space to execute queries on Elastic Agents assigned to different spaces without proper access control checks. This occurs because functionality is not properly constrained by ACLs (Access Control Lists), enabling unauthorized query execution and data disclosure from hosts in other spaces. The vulnerability affects Kibana version 9.1.0.
Potential Impact
An attacker with limited privileges to run Osquery live queries in one Kibana space can leverage this vulnerability to execute queries on hosts in other Kibana spaces they are not authorized to access. This leads to unauthorized disclosure of sensitive information from those hosts. The vulnerability does not impact availability but has a high impact on confidentiality and integrity of data.
Mitigation Recommendations
No official patch or remediation level has been published yet for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict Osquery live query permissions to trusted users only and monitor for unusual query activity across Kibana spaces.
CVE-2026-72666: CWE-639 Authorization Bypass Through User-Controlled Key in Elastic Kibana
Description
CVE-2026-72666 is an authorization bypass vulnerability in Elastic Kibana version 9.1.0. It allows a user authorized to run Osquery live queries in one Kibana space to execute queries on Elastic Agents assigned to other spaces they do not have access to. This results in unauthorized disclosure of information from hosts in those other spaces. The vulnerability is due to improper access control enforcement (CWE-639).
CVSS v3.1
Score 6.8medium
Affected software
Elastic
Kibana
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Kibana (CVE-2026-72666) involves an authorization bypass through a user-controlled key, classified under CWE-639. Specifically, it allows a user with permission to run Osquery live queries in one Kibana space to execute queries on Elastic Agents assigned to different spaces without proper access control checks. This occurs because functionality is not properly constrained by ACLs (Access Control Lists), enabling unauthorized query execution and data disclosure from hosts in other spaces. The vulnerability affects Kibana version 9.1.0.
Potential Impact
An attacker with limited privileges to run Osquery live queries in one Kibana space can leverage this vulnerability to execute queries on hosts in other Kibana spaces they are not authorized to access. This leads to unauthorized disclosure of sensitive information from those hosts. The vulnerability does not impact availability but has a high impact on confidentiality and integrity of data.
Mitigation Recommendations
No official patch or remediation level has been published yet for this vulnerability. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict Osquery live query permissions to trusted users only and monitor for unusual query activity across Kibana spaces.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- elastic
- Date Reserved
- 2026-08-10T11:17:45.103Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a7e1a84bf8831d539b1836a
Added to database: 08/13/2026, 19:27:00 UTC
Last enriched: 08/21/2026, 13:53:30 UTC
Last updated: 09/29/2026, 01:47:44 UTC
Views: 41
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