Security Vulnerability in Oracle Essbase by Oracle
CVE-2026-91639

7.7HIGH

Key Information:

Vendor

Oracle
Status
Oracle Essbase
Vendor
CVE Published:
20 October 2026

What is CVE-2026-91639?

A security vulnerability in Oracle Essbase allows attackers with low privileges and network access via HTTP to potentially compromise the system. While primarily affecting Oracle Essbase version 21.8.3.0.0, the implications of successful exploitation can extend to unauthorized access to sensitive data, putting critical data at risk. Organizations using this product must be vigilant and apply the necessary patches to mitigate exposure to this vulnerability.

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:
7.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.