CVE-2026-49095 Details
Description
Improper Input Validation (CWE-20) in the Kibana Fleet agent policy management feature can lead to privilege escalation. An authenticated user with Fleet management privileges can manipulate agent policy configuration by injecting values into a configuration override mechanism that is not adequately validated. An attacker can cause Elastic Agents to be issued API keys with elevated Elasticsearch privileges, potentially granting unauthorized read and write access to sensitive Elasticsearch security indices beyond what is intended for the Fleet management role.
A vulnerability allowing privilege escalation has been identified in Elastic Kibana versions 8.0.0 prior to 8.19.15 and 9.0.0 prior to 9.3.5 and 9.4.0 prior to 9.4.2. The issue arises from improper input validation in the Kibana Fleet agent policy management feature. An authenticated user with Fleet management privileges can exploit this vulnerability by injecting unvalidated values into a configuration override mechanism. This manipulation can result in Elastic Agents being issued API keys with elevated Elasticsearch privileges, unauthorized access to sensitive Elasticsearch security indices, and read and write rights beyond the intended scope of the Fleet management role.
Users can upgrade to Kibana versions 8.19.16, 9.3.5, or 9.4.2 to address this vulnerability. For those unable to upgrade, it is recommended to restrict the 'fleet-all' Kibana application privilege.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 29, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://discuss.elastic.co/t/kibana-fleet-8-19-16-9-3-5-and-9-4-2-security-update-esa-2026-38/386559 | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-20 | Improper Input Validation | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| elastic kibana | >= 8.0.0, < 8.19.16 >= 9.0.0, < 9.3.5 >= 9.4.0, < 9.4.2 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 21, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 1, 2026 | Initial Analysis | [email protected] |
| May 28, 2026 | New CVE Received | [email protected] |