CVE-2026-62393 in Kylin
Summary
by MITRE • 07/14/2026
Improper Handling of Insufficient Permissions or Privileges vulnerability in Apache Kylin. Improper authorization in job information retrieval, where an attacker may get access to unauthorized jobs in other projects.
This issue affects Apache Kylin: from 4 through 5.0.3.
Users are recommended to upgrade to version 5.0.4, which fixes the issue.
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Analysis
by VulDB Data Team • 07/14/2026
The vulnerability under discussion represents a critical authorization flaw in Apache Kylin, specifically categorized as an improper handling of insufficient permissions or privileges scenario that directly impacts job information retrieval mechanisms within the system. This weakness manifests when users with inadequate privileges attempt to access job data from projects they do not own, creating a significant security breach in the platform's access control model.
The technical implementation flaw stems from inadequate validation of user permissions during job information requests, allowing malicious actors or unauthorized individuals to bypass normal access controls and retrieve sensitive job metadata from other projects within the same Kylin instance. This improper authorization mechanism operates at the application level where job retrieval APIs fail to properly verify whether requesting users possess appropriate project-level permissions before returning job information. The vulnerability affects versions 4.0 through 5.0.3 of Apache Kylin, representing a widespread issue across multiple release lines that demonstrates the persistence of this authorization flaw within the codebase.
The operational impact of this vulnerability extends beyond simple data exposure, as it enables attackers to gather intelligence about other projects' job configurations, execution patterns, and potentially sensitive business processes running within the Kylin environment. This information disclosure can lead to further exploitation opportunities including targeted attacks against specific project components or understanding of system architecture to plan more sophisticated breaches. The flaw particularly affects organizations using Kylin for business intelligence and analytics workloads where job data often contains proprietary information about data processing pipelines, query execution details, and organizational workflows.
From a cybersecurity perspective, this vulnerability aligns with CWE-285 (Improper Authorization) and represents a clear violation of the principle of least privilege that should govern all enterprise analytics platforms. The ATT&CK framework categorizes this as a privilege escalation technique where an attacker leverages insufficient access controls to gain unauthorized information access from other system components. Organizations running affected versions of Apache Kylin face significant risk exposure, particularly in environments where multiple teams or departments share the same Kylin instance without proper isolation mechanisms.
The recommended remediation involves upgrading to Apache Kylin version 5.0.4 which implements proper authorization checks for job information retrieval operations. This upgrade addresses the core permission validation issue by ensuring that all job data access requests undergo comprehensive project-level permission verification before any information is returned to requesting users. Security teams should also implement additional monitoring of job access patterns and consider implementing network segmentation or separate Kylin instances for different organizational units to minimize potential impact from similar authorization flaws in other components. The fix demonstrates the importance of regular security updates and proper access control implementation in enterprise analytics platforms where data governance and privacy protection are paramount considerations.