CVE-2026-47039 in Database Server
Summary
by MITRE • 07/22/2026
Vulnerability in the Java VM component of Oracle Database Server. Supported versions that are affected are 19.3-19.31, 21.3-21.22 and 23.4.0-23.26.2. Easily exploitable vulnerability allows low privileged attacker having Create Session privilege with network access via Oracle Net to compromise Java VM. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Java VM accessible data. CVSS 3.1 Base Score 6.5 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).
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Analysis
by VulDB Data Team • 07/22/2026
This vulnerability resides within the Java Virtual Machine component of Oracle Database Server, representing a critical security flaw that affects specific version ranges including 19.3 through 19.31, 21.3 through 21.22, and 23.4.0 through 23.26.2. The vulnerability operates at the Java VM layer, which serves as the execution environment for Java-based applications within the database system, making it a particularly dangerous vector for attackers seeking to compromise database security. The flaw is classified as easily exploitable, indicating that minimal technical sophistication is required to leverage this weakness against targeted systems.
The technical mechanism of exploitation involves an attacker with minimal privileges who possesses the Create Session privilege and can establish network access through Oracle Net protocols. This configuration creates a pathway where unauthorized individuals can target the Java VM execution environment directly, bypassing traditional database security controls that typically protect data integrity. The vulnerability essentially allows attackers to gain unauthorized access to modify critical data within the Java VM accessible environment, potentially affecting all data that the Java execution context can reach. This attack vector demonstrates a significant privilege escalation capability where low-privilege users can exploit network connectivity to compromise core system components.
The operational impact of this vulnerability extends beyond simple data integrity concerns, as it enables unauthorized creation, deletion, or modification operations against Java VM accessible data resources. This comprehensive access level represents a severe compromise of database security posture, potentially allowing attackers to alter critical system configurations, manipulate financial records, modify user credentials, or corrupt essential database components that rely on Java execution capabilities. The CVSS 3.1 base score of 6.5 with integrity impacts specifically highlights the potential for data modification attacks, while the vector analysis reveals an attack complexity of low, requiring only local privileges and network connectivity to achieve successful exploitation.
Organizations affected by this vulnerability should implement immediate mitigations including patching to supported versions, restricting Oracle Net access through firewall rules, and implementing strict privilege controls to limit Create Session permissions. The vulnerability aligns with CWE-284 (Improper Access Control) and potentially maps to ATT&CK techniques involving privilege escalation and persistence within database environments. Security teams must also consider implementing network segmentation to isolate database servers from unnecessary network access points while monitoring for suspicious Oracle Net connection patterns that could indicate exploitation attempts.
This vulnerability represents a significant concern for enterprise database environments where Java-based applications are deployed, as it undermines fundamental security assumptions about privilege boundaries and data protection mechanisms. The combination of low attack complexity with high impact integrity consequences makes this vulnerability particularly dangerous in production environments where database administrators may not immediately recognize the scope of potential damage. Organizations should prioritize assessment of their affected systems, implementation of compensating controls, and monitoring for exploitation attempts that could compromise database integrity and confidentiality through Java VM access paths.