Security Vulnerability in Oracle Essbase Affects Network Access
CVE-2026-91644

9.3CRITICAL

Key Information:

Vendor

Oracle
Status
Oracle Essbase
Vendor
CVE Published:
20 October 2026

What is CVE-2026-91644?

A vulnerability has been identified in Oracle Essbase that allows unauthorized access to critical data through unauthenticated network access via HTTP. This easily exploitable security flaw affects version 21.8.3.0.0 of the product, putting sensitive data at risk. Attackers can gain complete access to all data within Oracle Essbase and may perform unauthorized updates, inserts, or deletions. Given the nature of the vulnerability, its exploitation can lead to significant impacts on confidentiality and integrity, requiring urgent attention to mitigate potential threats.

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:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.