CVE-2026-91632

Modified Modified - Updated After Analysis

Oracle Essbase Security Bypass Vulnerability

Publication date: 2026-10-20

Last updated on: 2026-10-26

Assigner: Oracle

Description

Vulnerability in Oracle Essbase (component: Security). The supported version that is affected is 21.8.3.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Essbase. While the vulnerability is in Oracle Essbase, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Essbase accessible data. CVSS 3.1 Base Score 7.7 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N).

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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-2026-91632

EUVD

EUVD-2026-106819

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	essbase	21.8.3.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-200	The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle Essbase version 21.8.3.0.0 within the Security component. It allows a low-privileged attacker with network access via HTTP to potentially compromise the system. Successful exploitation could lead to unauthorized access to critical data or complete access to all data accessible by Oracle Essbase.

Detection Guidance

Detection requires checking for Oracle Essbase versions and exposed HTTP interfaces. Verify installed versions with commands like 'opatch lsinventory' or check Oracle Essbase logs for unusual access patterns. Monitor network traffic for HTTP requests to Essbase ports (default 9000, 9001).

Impact Analysis

The vulnerability may allow attackers to gain unauthorized access to sensitive data stored or processed by Oracle Essbase. This could result in data breaches, loss of confidential information, or further compromise of systems connected to the affected Oracle Essbase instance.

Compliance Impact

This vulnerability allows unauthorized access to critical or all Oracle Essbase accessible data, which could lead to exposure of sensitive personal or health information. This may violate GDPR's data protection requirements or HIPAA's safeguards for protected health information if such data is compromised.

Mitigation Strategies

Apply the latest security patches from Oracle for Oracle Essbase version 21.8.3.0.0. Restrict network access to HTTP ports used by Oracle Essbase. Review and enforce least privilege access controls for users. Monitor logs for suspicious activity related to Oracle Essbase.

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