Security Vulnerability in Oracle Essbase — Oracle
CVE-2026-91660

4.3MEDIUM

Key Information:

Vendor

Oracle
Status
Oracle Essbase
Vendor
CVE Published:
20 October 2026

What is CVE-2026-91660?

An exploitable security vulnerability exists in Oracle Essbase, affecting version 21.8.3.0.0. The vulnerability allows a low privileged attacker with HTTP network access to compromise the system. This compromise can lead to a partial denial of service, impairing the availability of Oracle Essbase services. Mitigation and security measures are advised to protect against potential exploitation.

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:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.