A critical vulnerability in Oracle Hyperion Calculation Manager allows authenticated attackers to take over the application and potentially impact integrated systems.

This vulnerability resides in the Security component of Hyperion Calculation Manager. It allows an authenticated, low privileged attacker to achieve full system takeover by sending malicious HTTP requests, with the potential to affect other integrated Oracle Hyperion products due to a scope change.

With a CVSS score of 9.9, this vulnerability represents a severe risk to organizational data integrity and availability. A successful attack grants an adversary full control over the Calculation Manager, which could lead to the manipulation of financial or operational data, unauthorized system access, and significant operational disruption.

Immediate Action: Update to the latest version of Oracle Hyperion Calculation Manager as specified in the August 2026 Oracle security advisory.

Proactive Monitoring: Review web server logs for suspicious HTTP requests targeting the Calculation Manager security module and monitor for unauthorized changes to system configurations.

Compensating Controls: Implement Web Application Firewall (WAF) rules to filter and block malicious HTTP traffic directed at the Hyperion environment, particularly requests targeting administrative or security functions.

Public Exploit Available: No

The severity of this vulnerability necessitates immediate attention. Organizations utilizing Oracle Hyperion Calculation Manager version 11.2.25.0.000 should apply the necessary patches immediately to mitigate the risk of unauthorized system takeover.