CVE-2026-91644

Modified Modified - Updated After Analysis

Oracle Essbase Unauthorized Data Access Vulnerability

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 unauthenticated 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 as well as unauthorized update, insert or delete access to some of Oracle Essbase accessible data. CVSS 3.1 Base Score 9.3 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N).

CVSS Scores

EPSS Scores

Probability:
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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-2026-91644

EUVD

EUVD-2026-106831

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	essbase	21.8.3.0.0

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 Oracle Essbase version 21.8.3.0.0 under the Security component. It allows an unauthenticated attacker with network access via HTTP to compromise the system. Successful exploitation can lead to unauthorized access to critical data or complete access to all Oracle Essbase accessible data, as well as unauthorized modifications to some of that data.

Detection Guidance

This vulnerability affects Oracle Essbase 21.8.3.0.0 and can be exploited via HTTP. Detection may involve checking for unauthorized access attempts or unusual network traffic targeting Oracle Essbase ports. Review logs for HTTP requests to Essbase services and verify authentication status. No specific commands are provided in the context.

Impact Analysis

If exploited, this vulnerability could allow attackers to gain unauthorized access to sensitive data stored in Oracle Essbase. They could read, modify, or delete data, potentially leading to data breaches, loss of confidentiality, and integrity issues. The high CVSS score indicates a significant risk of severe impact.

Compliance Impact

This vulnerability could lead to unauthorized access or disclosure of personal or sensitive data, violating compliance requirements under GDPR, HIPAA, and other regulations. Organizations using Oracle Essbase may face legal penalties, reputational damage, and increased scrutiny due to potential data breaches.

Mitigation Strategies

Apply the latest security patches from Oracle for Essbase version 21.8.3.0.0. Restrict network access to Oracle Essbase via HTTP to trusted sources only. Monitor network traffic for unauthorized access attempts to the Oracle Essbase service.

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EPSS Chart

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