Security Flaw in Oracle Essbase Affects Versions 21.8.3.0.0
CVE-2026-91637

9.9CRITICAL

Key Information:

Vendor

Oracle
Status
Oracle Essbase
Vendor
CVE Published:
20 October 2026

What is CVE-2026-91637?

A security vulnerability has been identified in Oracle Essbase that can be exploited by low-privileged attackers with network access via HTTP. This flaw allows unauthorized access and potential takeover of the Oracle Essbase environment. While the vulnerability resides within Essbase, the impact may extend to other connected products. Organizations using Oracle Essbase version 21.8.3.0.0 are advised to implement measures to safeguard their systems.

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

.