CVE-2026-91503

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VPD Component Privilege Escalation in Oracle Database Server

Publication date: 2026-10-20

Last updated on: 2026-10-24

Assigner: Oracle

Description

Vulnerability in the VPD component of Oracle Database Server. Supported versions that are affected are 19.3-19.32, 21.3-21.23 and 23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Create Table privilege with network access via Oracle Net to compromise VPD. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all VPD accessible data as well as unauthorized access to critical data or complete access to all VPD accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-10-24

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-91503

EUVD

EUVD-2026-106746

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle Corporation	Oracle Database Server	19.3
Oracle Corporation	Oracle Database Server	21.3
Oracle Corporation	Oracle Database Server	23.4.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in the Virtual Private Database (VPD) component of Oracle Database Server affecting versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3. It allows a low-privileged attacker with Create Table privilege and network access to exploit the system via Oracle Net. Successful exploitation can lead to unauthorized creation, deletion, or modification of critical data or all VPD-accessible data, as well as unauthorized access to critical data.

Detection Guidance

This vulnerability requires detection through Oracle Database Server monitoring since it involves the VPD component. Check for unusual table creation or modification events by privileged users with Create Table access. Review Oracle audit logs for suspicious activities related to VPD policies or data access. Ensure Oracle Database Server versions 19.3-19.32, 21.3-21.23, or 23.4.0-23.26.3 are updated to the latest patches.

Impact Analysis

This vulnerability can allow attackers to modify or delete sensitive data, access confidential information, or gain complete control over all data accessible through the VPD component. The high CVSS score of 8.1 indicates significant risk to data confidentiality and integrity.

Compliance Impact

This vulnerability could lead to unauthorized data access or modification, violating compliance requirements for GDPR (data protection), HIPAA (health information security), and other regulations. Non-compliance may result in legal penalties, reputational damage, and loss of trust.

Mitigation Strategies

Apply the latest Oracle Database Server patches for versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3 to address the VPD component vulnerability. Restrict network access to Oracle Net and limit Create Table privileges to trusted users.

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