CVE-2026-91640

Modified Modified - Updated After Analysis

Information Disclosure in Oracle Essbase

Publication date: 2026-10-20

Last updated on: 2026-10-27

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 read access to a subset of Oracle Essbase accessible data. CVSS 3.1 Base Score 5.0 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N).

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Meta Information

Published

2026-10-20

Last Modified

2026-10-27

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-91640

EUVD

EUVD-2026-106827

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 related to its Security component. It allows a low-privileged attacker with network access via HTTP to read some data stored in Oracle Essbase without authorization. The impact is limited to unauthorized data access, not modification or deletion.

Detection Guidance

The provided CVE details do not include specific detection methods or commands. Detection would typically involve checking Oracle Essbase versions, network traffic analysis for HTTP access, and reviewing access logs for unauthorized data reads. Consult Oracle's security advisories and documentation for guidance.

Impact Analysis

If you use Oracle Essbase 21.8.3.0.0, an attacker could gain unauthorized read access to some of your Oracle Essbase data. This could lead to exposure of sensitive information, though they cannot alter or delete data.

Compliance Impact

This vulnerability allows unauthorized read access to a subset of Oracle Essbase data, which could lead to unauthorized disclosure of sensitive information. This may impact compliance with GDPR (data protection) and HIPAA (healthcare data privacy) by potentially exposing personal or protected health information without authorization.

Mitigation Strategies

Apply the latest security patches from Oracle for Oracle Essbase version 21.8.3.0.0. Restrict network access to Oracle Essbase via HTTP to trusted sources only. Review and limit user privileges to the minimum required for operations.

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