CVE-2026-91563

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Oracle OLAP Remote Code Execution Vulnerability

Publication date: 2026-10-20

Last updated on: 2026-10-26

Assigner: Oracle

Description

Vulnerability in the Oracle OLAP 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 DBMS_AW privilege with network access via Oracle Net to compromise Oracle OLAP. Successful attacks of this vulnerability can result in takeover of Oracle OLAP. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

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Meta Information

Published

2026-10-20

Last Modified

2026-10-26

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-91563

EUVD

EUVD-2026-106785

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle Corporation	Oracle OLAP	19.3
Oracle Corporation	Oracle OLAP	21.3
Oracle Corporation	Oracle OLAP	23.4.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-269	The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

Attack-Flow Graph

Executive Summary

This is a vulnerability in the Oracle OLAP component of Oracle Database Server. It affects versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3. The issue allows a low-privileged attacker with DBMS_AW privilege and network access to compromise Oracle OLAP, potentially leading to a full takeover of the system.

Detection Guidance

Detection requires checking Oracle Database Server versions and verifying if DBMS_AW privileges are assigned to low-privileged users. Oracle OLAP versions 19.3-19.32, 21.3-21.23, and 23.4.0-23.26.3 are affected. Query the database for version and privilege assignments using SQL commands like SELECT * FROM v$version WHERE banner LIKE '%Oracle%'; and SELECT grantee FROM dba_sys_privs WHERE privilege = 'DBMS_AW';.

Impact Analysis

If exploited, this vulnerability could allow an attacker to take over the Oracle OLAP component, leading to unauthorized access, data breaches, or system disruption. This could impact confidentiality, integrity, and availability of sensitive data stored in the database.

Compliance Impact

This vulnerability allows low-privileged attackers to compromise Oracle OLAP, potentially leading to unauthorized access, data breaches, or system takeover. Such impacts could violate GDPR's data protection requirements or HIPAA's safeguards for protected health information if exploited.

Mitigation Strategies

Apply the latest Oracle Database Server patches for affected versions to address the vulnerability in the OLAP component. Restrict network access to Oracle Net and limit privileges for DBMS_AW to only necessary users.

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