CVE-2026-9762 in Db2
Summary
by MITRE • 07/17/2026
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to remote code execution when jdbc url is under user control.
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Analysis
by VulDB Data Team • 07/17/2026
This vulnerability exists in IBM Db2 database versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.4 where remote code execution can be achieved when a JDBC URL is under user control. The flaw stems from inadequate input validation and sanitization mechanisms within the database driver's handling of JDBC connection strings. When an attacker can influence the JDBC URL parameter, they can inject malicious components that bypass normal security boundaries and execute arbitrary code on the target system. This represents a critical security weakness that aligns with CWE-94, which describes improper control of generation of code, and specifically relates to command injection vulnerabilities within database connectivity layers.
The technical exploitation occurs through manipulation of JDBC connection parameters that are processed by the Db2 driver without sufficient validation. Attackers can craft malicious JDBC URLs containing specially formatted commands or payloads that get interpreted and executed by the underlying database engine. This vulnerability affects the database's authentication and authorization mechanisms, potentially allowing unauthorized users to escalate privileges or execute arbitrary commands with the privileges of the database service account. The impact extends beyond simple data access as it enables full system compromise through remote code execution capabilities.
From an operational standpoint, this vulnerability creates significant risk for organizations relying on IBM Db2 databases where applications might be vulnerable to user-controlled input in JDBC connection strings. The attack surface includes web applications, enterprise systems, and any environment where database connections are dynamically constructed from user-supplied data. Organizations may experience unauthorized access to sensitive data, system compromise, and potential lateral movement within network environments. This vulnerability particularly impacts environments using dynamic connection string construction or parameterized queries that do not properly sanitize user inputs before being passed to the JDBC driver.
Mitigation strategies should focus on implementing strict input validation for all JDBC URL parameters, applying the latest security patches from IBM, and restricting database connectivity through proper network segmentation and access controls. Organizations must ensure that JDBC connection strings are validated against known good patterns and that any user-supplied input is properly escaped or sanitized before being processed by the database driver. Additional protective measures include monitoring for unusual connection patterns, implementing web application firewalls, and following defense-in-depth principles to limit the potential impact of successful exploitation attempts. This vulnerability demonstrates the critical importance of secure coding practices in database connectivity components and aligns with ATT&CK technique T1059.007 for command and script injection attacks.