CVE-2026-63262 in Kibana
Summary
by MITRE • 07/22/2026
Missing Authorization (CWE-862) in Kibana can lead to unauthorized cross-space information disclosure via user-supplied input that circumvents space-level access control.
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Analysis
by VulDB Data Team • 07/22/2026
The vulnerability described represents a critical authorization flaw classified as CWE-862, which specifically addresses missing authorization checks in software systems. This weakness manifests in Kibana where the application fails to properly validate user permissions when accessing different spaces within the platform. The flaw stems from insufficient input validation mechanisms that allow malicious actors to manipulate requests and bypass established space-level access controls through user-supplied inputs.
This vulnerability operates by exploiting the lack of proper authorization enforcement between users and spaces, enabling attackers to access data and resources that should be restricted to specific user groups or roles. The technical implementation appears to involve inadequate validation of space identifiers in API requests, allowing unauthorized access attempts to traverse normal access control boundaries. When users provide crafted input parameters that reference different spaces, the system fails to verify whether the requesting user possesses legitimate permissions for those target spaces.
The operational impact of this vulnerability is severe and multifaceted across enterprise security environments. Organizations utilizing Kibana for log management and monitoring may experience unauthorized cross-space information disclosure, potentially exposing sensitive data from multiple departments or business units within a single platform instance. This could lead to compliance violations, data breaches, and significant operational disruptions. The vulnerability particularly affects multi-tenant environments where different teams or organizations share the same Kibana instance but require isolated data access.
The exploitation of this weakness aligns with techniques documented in the attack pattern catalog under the MITRE ATT&CK framework, specifically related to privilege escalation and lateral movement within compromised systems. Attackers can leverage this vulnerability to gain unauthorized access to sensitive information that should remain isolated within specific organizational boundaries. This represents a direct violation of the principle of least privilege and could enable further attacks by providing access to additional system resources or data.
Mitigation strategies should focus on implementing robust authorization controls that validate user permissions against space-level access policies before processing any requests. Organizations must ensure proper input sanitization and validation mechanisms are in place to prevent malicious input from bypassing normal access control checks. Security patches and updates should be applied immediately, while administrators should review and enforce strict access control policies within Kibana configurations. Additionally, implementing comprehensive logging and monitoring of space access attempts can help detect unauthorized access patterns and support incident response activities. The solution requires strengthening the authorization layer to ensure that all user requests are properly authenticated and authorized against defined space-level permissions before any data is returned or processed.