CVE-2026-72662: CWE-639 Authorization Bypass Through User-Controlled Key in Elastic Kibana
Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to unauthorized disclosure, modification, and deletion of data via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). An authenticated user granted the Timeline feature privilege in a Kibana space could enumerate, read, modify, and delete draft Timeline objects belonging to other users in the same space. Read access is sufficient for enumeration and disclosure; the Timeline write privilege is required for modification and deletion.
AI Analysis
Technical Summary
This vulnerability (CWE-639) in Kibana arises from improper access control enforcement on draft Timeline objects. Specifically, an authenticated user granted the Timeline feature privilege can bypass authorization checks to access, modify, or delete draft Timeline objects of other users within the same Kibana space. The flaw allows unauthorized disclosure and manipulation of data through access to functionality not properly constrained by ACLs (Access Control Lists).
Potential Impact
An attacker with authenticated access and the Timeline feature privilege can enumerate and read draft Timeline objects of other users, leading to unauthorized disclosure of potentially sensitive data. If the attacker also has Timeline write privileges, they can modify or delete these objects, impacting data integrity and availability within the affected Kibana space.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. In the meantime, restrict Timeline feature privileges to trusted users only and monitor access to Timeline objects. Follow Elastic's official advisories for updates on patches or mitigations.
CVE-2026-72662: CWE-639 Authorization Bypass Through User-Controlled Key in Elastic Kibana
Description
Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to unauthorized disclosure, modification, and deletion of data via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). An authenticated user granted the Timeline feature privilege in a Kibana space could enumerate, read, modify, and delete draft Timeline objects belonging to other users in the same space. Read access is sufficient for enumeration and disclosure; the Timeline write privilege is required for modification and deletion.
CVSS v3.1
Score 6.3medium
Affected software
Elastic
Kibana
pkg:github/elastic/kibanaRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-639) in Kibana arises from improper access control enforcement on draft Timeline objects. Specifically, an authenticated user granted the Timeline feature privilege can bypass authorization checks to access, modify, or delete draft Timeline objects of other users within the same Kibana space. The flaw allows unauthorized disclosure and manipulation of data through access to functionality not properly constrained by ACLs (Access Control Lists).
Potential Impact
An attacker with authenticated access and the Timeline feature privilege can enumerate and read draft Timeline objects of other users, leading to unauthorized disclosure of potentially sensitive data. If the attacker also has Timeline write privileges, they can modify or delete these objects, impacting data integrity and availability within the affected Kibana space.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. In the meantime, restrict Timeline feature privileges to trusted users only and monitor access to Timeline objects. Follow Elastic's official advisories for updates on patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- elastic
- Date Reserved
- 2026-08-10T11:17:45.102Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab83075f7a7c54106b68183
Added to database: 09/26/2026, 20:52:05 UTC
Last enriched: 09/26/2026, 21:03:19 UTC
Last updated: 09/27/2026, 04:47:33 UTC
Views: 11
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