Oracle Essbase Security Bypass Vulnerability

Publication date: 2026-10-20

Last updated on: 2026-10-20

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).

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-20

Last Modified

2026-10-20

Generated

2026-10-21

AI Q&A

2026-10-21

EPSS Evaluated

N/A

NVD

CVE-2026-91661

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle	Corporation	Oracle Essbase 21.8.3.0.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

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 compromise the system. Successful exploitation can lead to unauthorized access to critical data or complete access to all Oracle Essbase accessible data.

Impact Analysis

The vulnerability can result in unauthorized access to sensitive data stored in Oracle Essbase. Attackers may gain access to critical information, potentially leading to data breaches, loss of confidentiality, or further compromise of systems relying on Oracle Essbase.

Mitigation Strategies

Apply the latest Oracle Essbase security patches immediately. Restrict network access to Oracle Essbase via HTTP to trusted sources only. Review and update user privileges to ensure least privilege access. Monitor logs for unusual activity targeting Oracle Essbase.

Hi! I’m here to help you understand CVE-2026-91661. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70