Security Vulnerability in Oracle Essbase Affects Unauthenticated Network Access
CVE-2026-91645

5.3MEDIUM

Key Information:

Vendor

Oracle
Status
Oracle Essbase
Vendor
CVE Published:
20 October 2026

What is CVE-2026-91645?

A security vulnerability in Oracle Essbase allows unauthenticated attackers with network access via HTTP to gain access to sensitive data. Specifically, this flaw affects version 21.8.3.0.0, enabling potential unauthorized reading of a subset of data accessible in Oracle Essbase environments. Organizations utilizing this version should consider taking immediate action to mitigate risks associated with unauthorized data access.

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:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.