CVE-2026-96443 in Doris
Summary
by MITRE • 09/23/2026
Insufficient validation of the JDBC driver URL in Apache Doris allows a privileged user to achieve remote code execution on the FE.
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Analysis
by VulDB Data Team • 09/23/2026
The vulnerability identified in Apache Doris stems from an insufficient validation mechanism within the Java Database Connectivity (JDBC) driver integration layer, specifically affecting the Frontend nodes responsible for coordinating cluster operations and handling client requests. This flaw allows a privileged user to inject malicious parameters into the JDBC URL string that is processed by the underlying database engine. The core technical issue lies in the failure to strictly sanitize or validate specific protocol handlers defined within the connection string before they are passed to the Java class loader. In many enterprise data warehouse environments, Apache Doris serves as a critical component for large-scale analytics, making such access controls and input validation mechanisms vital for maintaining system integrity.
From a technical perspective, this vulnerability exploits the flexibility of JDBC URL parsing in Java applications. When a user provides a connection string containing custom or non-standard protocol handlers, the application may attempt to load corresponding classes dynamically without verifying their origin or safety. If an attacker can control these parameters, they can potentially trigger the loading of arbitrary code during the initialization phase of the database connection. This process bypasses standard security checks because the validation logic does not adequately restrict which class loaders are permitted to instantiate objects based on the provided URL structure. The result is a path for remote code execution where the malicious payload executes with the same privileges as the Apache Doris Frontend service, typically running under a dedicated system account that may have significant access to underlying operating system resources and data files.
The operational impact of this vulnerability is severe due to its potential for complete system compromise. An attacker who successfully exploits this flaw can execute arbitrary commands on the host machine where the Frontend node resides. This could lead to unauthorized access to sensitive analytical datasets, modification or deletion of critical metadata, and further lateral movement within the network infrastructure. Since Apache Doris often handles aggregated data from multiple sources, compromising a single Frontend node might expose vast amounts of business-critical information. Furthermore, because the vulnerability requires privileged user status for exploitation, it highlights a risk in environments where administrative accounts are shared or have overly broad permissions, potentially violating the principle of least privilege essential for secure system administration.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. The primary recommendation is to apply the official security patches provided by Apache Doris as soon as they become available, which typically involve hardening the input validation logic within the JDBC driver integration code. In addition to patching, organizations should enforce strict network segmentation to limit access to Frontend nodes only from trusted management networks and authorized application servers. Implementing robust identity and access management policies is also crucial; administrators should ensure that privileged accounts are strictly controlled, monitored for anomalous activity, and used exclusively by designated personnel with multi-factor authentication enabled where possible. Regular security audits of database connection configurations can help identify any deviations from secure coding standards before they are exploited in production environments.
This vulnerability aligns with CWE-20 Improper Input Validation, as the system fails to verify that user-supplied input meets expected criteria for safety and format. It also relates to CWE-94 Code Injection, specifically through the manipulation of JDBC URL parameters to trigger unintended code execution paths. From an offensive security perspective, this exploit technique corresponds to ATT&CK T1059 Command and Scripting Interpreter, where attackers use system utilities or scripts to execute commands on a compromised host. Understanding these mappings helps in configuring detection rules within Security Information and Event Management systems to monitor for unusual patterns in database connection attempts that might indicate an exploitation attempt. By addressing the root cause through code fixes and reinforcing operational security practices, organizations can significantly reduce their risk exposure associated with this class of vulnerabilities in distributed data processing platforms.