CVE-2026-61276 Overview
CVE-2026-61276 is a high-severity vulnerability in the Oracle Hyperion Calculation Manager product of Oracle Hyperion, specifically within the Security component. The affected supported version is 11.2.25.0.000. The flaw allows a low-privileged attacker with network access over HTTP to compromise the application. Successful exploitation results in full takeover of Oracle Hyperion Calculation Manager, impacting confidentiality, integrity, and availability.
Critical Impact
A low-privileged remote attacker can take over Oracle Hyperion Calculation Manager over HTTP, gaining full control of the application and its data.
Affected Products
- Oracle Hyperion Calculation Manager
- Oracle Hyperion product family (Security component)
- Supported version 11.2.25.0.000
Discovery Timeline
- 2026-08-18 - CVE-2026-61276 published to NVD
- 2026-08-20 - Last updated in NVD database
Technical Details for CVE-2026-61276
Vulnerability Analysis
The vulnerability resides in the Security component of Oracle Hyperion Calculation Manager. Oracle describes the issue as easily exploitable, requiring only network access over HTTP and low-privileged authentication. An authenticated attacker with a basic user account can escalate to full application takeover. The impact spans confidentiality, integrity, and availability, meaning the attacker can read, modify, and disrupt calculation rules, business logic, and financial data managed by the application.
Oracle Hyperion Calculation Manager is used to design, validate, and administer business rules for Enterprise Performance Management applications. Compromise of this component exposes financial planning, consolidation, and reporting workflows to manipulation. Attackers who take over the service can pivot into connected Essbase, Planning, and Financial Reporting components.
Root Cause
Oracle has not published detailed root-cause information beyond identifying the Security component as the affected subsystem. The advisory characterizes the issue as a security control weakness enabling privilege escalation to full takeover. Refer to the Oracle Security Alert for authoritative details.
Attack Vector
The attack vector is network-based over HTTP. An attacker must hold valid low-privileged credentials in the target environment. No user interaction is required. Once authenticated, the attacker sends crafted HTTP requests to the Calculation Manager endpoint to abuse the Security component and gain administrative control.
Because no verified proof-of-concept code has been published, refer to the vendor advisory for exploitation prerequisites rather than synthetic examples.
Detection Methods for CVE-2026-61276
Indicators of Compromise
- Unexpected administrative actions or rule modifications in Oracle Hyperion Calculation Manager audit logs performed by low-privileged accounts.
- Anomalous HTTP request patterns targeting Calculation Manager URIs from internal user accounts that do not normally interact with the service.
- New or modified calculation rules, security filters, or user role assignments outside of change-control windows.
Detection Strategies
- Monitor Hyperion application and web-tier logs for authentication events followed by rapid privilege changes or administrative API calls.
- Correlate HTTP access logs against expected user-to-role mappings to identify privilege escalation attempts.
- Baseline normal Calculation Manager usage per user and alert on deviations, such as unusual endpoint access or bulk rule exports.
Monitoring Recommendations
- Forward Oracle Hyperion middleware and WebLogic logs to a centralized SIEM for correlation and long-term retention.
- Enable and review Hyperion Shared Services audit logs for role membership and provisioning changes.
- Alert on outbound connections from Hyperion servers to unexpected destinations, which may indicate post-exploitation activity.
How to Mitigate CVE-2026-61276
Immediate Actions Required
- Apply the fixes referenced in the Oracle Security Alert for the August 2026 Critical Patch Update as soon as possible.
- Inventory all Oracle Hyperion Calculation Manager deployments and confirm which are running the affected 11.2.25.0.000 release.
- Rotate credentials for low-privileged Hyperion accounts and enforce multi-factor authentication where supported.
- Restrict network reachability of Calculation Manager HTTP endpoints to trusted management networks only.
Patch Information
Oracle addresses this vulnerability in the August 2026 Critical Patch Update. Administrators should download and apply the appropriate patch for Oracle Hyperion Calculation Manager 11.2.25.0.000 from My Oracle Support. Consult the Oracle Security Alert for the specific patch identifiers and prerequisites.
Workarounds
- Place Oracle Hyperion Calculation Manager behind a reverse proxy or WAF that restricts access to authenticated administrators only.
- Review and reduce the number of accounts with any level of access to Hyperion services until patches are applied.
- Segment Hyperion servers from general user networks and require VPN or jump-host access for administration.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
