CVE-2026-49095 HIGH

CVE-2026-49095: Improper Input Validation in Kibana Fleet Leading to Privilege Escalation

Vendor Elastic
Product Kibana
Weakness CWE-20 · Input validation
Published May 28, 2026
Last update May 30, 2026

CVSS base score

7.2/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

May 28, 2026 CVE published
May 30, 2026 Record updated