Vulnerability in Oracle Essbase Security Component
CVE-2026-91658

9.9CRITICAL

Key Information:

Vendor

Oracle
Status
Oracle Essbase
Vendor
CVE Published:
20 October 2026

What is CVE-2026-91658?

A security vulnerability exists in Oracle Essbase that allows a low-privileged attacker to exploit the system with network access via HTTP. This flaw can lead to a significant compromise of Oracle Essbase, affecting its functionality and potentially impacting additional products. The vulnerability is particularly concerning as it allows unauthorized access, leading to a takeover of the system, and it can severely compromise confidentiality, integrity, and availability.

Affected Version(s)

Oracle Essbase 21.8.3.0.0

References

https://www.oracle.com/security-alerts/cpuoct2026.html
vendor-advisory

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.