CVE-2026-62392 in Kylin
Summary
by MITRE • 07/14/2026
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Apache Kylin. A backend API may bring job config parameters to OS command line.
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
Apache Kylin suffers from a critical operating system command injection vulnerability that stems from improper neutralization of special elements in OS commands. This flaw exists within the backend API functionality where job configuration parameters are passed directly to operating system command lines without adequate sanitization or validation. The vulnerability allows attackers to inject malicious commands that execute with the privileges of the Kylin process, potentially leading to complete system compromise.
The technical implementation of this vulnerability occurs when user-supplied input from job configuration parameters flows directly into system command execution contexts. This pattern creates a classic os command injection attack vector where special shell metacharacters such as semicolons, pipes, and backticks can be used to chain additional commands. The issue manifests specifically in versions 4.0 through 5.0.3 of Apache Kylin, where the API layer fails to properly escape or validate input before incorporating it into command line arguments. This weakness aligns with CWE-78, which describes improper neutralization of special elements used in operating system commands.
The operational impact of this vulnerability extends beyond simple command execution, potentially enabling attackers to escalate privileges, access sensitive data, or disrupt services entirely. An attacker could leverage this vulnerability to execute arbitrary code on the server hosting Kylin, potentially gaining access to underlying databases, configuration files, and other system resources. The risk is particularly elevated in environments where Kylin operates with elevated privileges or where it processes untrusted input from multiple sources. This vulnerability directly maps to attack techniques documented in the MITRE ATT&CK framework under TA0002 (Execution) and TA0006 (Credential Access), as successful exploitation could lead to both command execution and credential compromise.
Organizations utilizing Apache Kylin within affected versions should immediately implement the recommended upgrade to version 5.0.4, which includes proper input sanitization mechanisms that prevent special characters from being interpreted as shell commands. Additional mitigations may include implementing strict input validation at multiple layers, employing parameterized command execution where possible, and monitoring system logs for suspicious command patterns. Security teams should also consider network segmentation and privilege separation to limit the potential impact should exploitation occur. The vulnerability represents a significant risk to data integrity and system availability, making immediate remediation essential for all affected deployments.
This issue demonstrates the critical importance of input validation in security-sensitive applications and highlights how seemingly benign API functionality can create dangerous attack surfaces when proper sanitization measures are omitted. The fix implemented in version 5.0.4 addresses the root cause by ensuring that all user-provided parameters undergo appropriate escaping or encoding before being incorporated into system command contexts, thereby preventing the execution of unintended commands while preserving legitimate functionality.