CVE-2026-70899: Oracle Hyperion DRM Auth Bypass Flaw

CVE-2026-70899 Overview

CVE-2026-70899 is an access control vulnerability in the Oracle Hyperion Data Relationship Management product, part of the Oracle Hyperion suite. The flaw resides in the Access and security component and affects version 11.2.25.0.000. A low-privileged attacker with network access over HTTP can exploit this weakness to compromise the application. Successful exploitation results in full takeover of Oracle Hyperion Data Relationship Management, impacting confidentiality, integrity, and availability. The vulnerability is classified under CWE-284: Improper Access Control.

Critical Impact
An authenticated attacker with minimal privileges can take over Oracle Hyperion Data Relationship Management through low-complexity HTTP requests, compromising sensitive master data governance workflows.

Affected Products

Oracle Hyperion Data Relationship Management 11.2.25.0.000
Oracle Hyperion product family (Access and security component)
Deployments exposing the Data Relationship Management web interface over HTTP

Discovery Timeline

2026-08-18 - CVE-2026-70899 published to NVD
2026-08-22 - Last updated in NVD database

Technical Details for CVE-2026-70899

Vulnerability Analysis

Oracle Hyperion Data Relationship Management (DRM) governs master data across financial and enterprise performance management systems. This vulnerability sits in the Access and security component, which enforces authentication and authorization for administrative and data operations. Improper access control allows an authenticated user with low privileges to perform actions reserved for higher-privileged roles. The attacker requires only network access over HTTP and does not need user interaction. Because DRM manages hierarchies, versions, and relationships used across downstream reporting systems, takeover of the application affects data integrity across dependent enterprise systems.

Root Cause

The root cause is improper access control [CWE-284] within the Access and security component of Oracle Hyperion Data Relationship Management. The component fails to fully enforce privilege boundaries on requests handled by the application, permitting a low-privileged authenticated user to reach functions or data intended for administrators. Oracle has not published component-level technical details beyond the security advisory.

Attack Vector

The attack is delivered over the network using HTTP against the Data Relationship Management web tier. The attacker must first authenticate with low-privilege credentials, which may be obtained through credential theft, insider access, or default and weak account misuse. After authentication, the attacker issues crafted HTTP requests that bypass authorization enforcement in the affected component. Successful requests grant control equivalent to a takeover of the DRM instance, enabling arbitrary changes to master data hierarchies and configuration.

No public proof-of-concept exploit or exploitation-in-the-wild reporting is available for CVE-2026-70899 at the time of publication. Refer to the Oracle Security Advisory for authoritative vendor guidance.

Detection Methods for CVE-2026-70899

Indicators of Compromise

Unexpected privilege changes, role assignments, or administrative operations performed by non-administrative DRM accounts.
Anomalous HTTP requests to DRM administrative endpoints originating from low-privileged user sessions.
Unauthorized modifications to hierarchies, versions, or property definitions within Oracle Hyperion Data Relationship Management.
Authentication events from atypical source IPs or during off-hours followed by sensitive DRM operations.

Detection Strategies

Enable and centralize DRM audit logs, then baseline expected activity per role to surface access control deviations.
Correlate application-tier HTTP logs with authentication events to detect privilege boundary violations.
Alert on sequences where a low-privileged session performs configuration, security, or hierarchy administration actions.

Monitoring Recommendations

Ingest Oracle Hyperion DRM application, web tier, and database logs into a centralized SIEM for correlation and retention.
Monitor for changes to security roles, node access groups, and property category permissions inside DRM.
Track outbound integrations from DRM to downstream EPM and ERP systems for unexpected master data flows.

How to Mitigate CVE-2026-70899

Immediate Actions Required

Apply the Oracle Critical Patch Update referenced in the Oracle Security Advisory for Oracle Hyperion Data Relationship Management 11.2.25.0.000.
Inventory all DRM deployments and confirm patch level; prioritize internet-facing or partner-accessible instances.
Rotate credentials for low-privileged DRM accounts and enforce multi-factor authentication on the identity provider fronting Hyperion.
Review DRM role assignments and remove unused or over-permissioned accounts.

Patch Information

Oracle addressed CVE-2026-70899 in the August 2026 Critical Patch Update. Administrators should download and install the vendor-supplied patch for Oracle Hyperion Data Relationship Management version 11.2.25.0.000 as directed by the Oracle Security Advisory. Validate the patch in a staging environment before promoting it to production, and confirm audit and integration functions after deployment.

Workarounds

Restrict network access to the DRM web interface to trusted management networks using firewall and reverse proxy rules.
Require VPN or zero-trust network access for all administrative and end-user connections to Hyperion services.
Disable or lock low-privileged accounts that are not actively required until patching is complete.
Increase logging verbosity on DRM authentication and authorization events to accelerate detection while remediation is underway.

bash

# Configuration example: restrict DRM web tier to trusted subnets (iptables)
iptables -A INPUT -p tcp --dport 5240 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 5240 -j DROP