Security Flaw in Oracle Essbase Exposes Sensitive Data and Services
CVE-2026-91642

7.3HIGH

Key Information:

Vendor

Oracle
Status
Oracle Essbase
Vendor
CVE Published:
20 October 2026

What is CVE-2026-91642?

A security flaw in Oracle Essbase enables an unauthenticated attacker to exploit the vulnerability over HTTP, leading to unauthorized access to sensitive data. The attacker may manipulate accessible data, including performing unauthorized updates and deletions, and gain partial control, risking a capability to cause a partial denial of service. The affected version is 21.8.3.0.0, which requires immediate review to mitigate potential risks.

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:
7.3
Severity:
HIGH
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.