CVE-2026-70889: Oracle Hyperion DRM Auth Bypass Flaw

CVE-2026-70889 Overview

CVE-2026-70889 is an access control vulnerability in the Oracle Hyperion Data Relationship Management product, within the Access and security component. The affected version is 11.2.25.0.000. An unauthenticated attacker with network access via HTTP can exploit this flaw to compromise confidentiality. Successful exploitation results in unauthorized access to critical data or complete access to all Oracle Hyperion Data Relationship Management accessible data. The vulnerability is categorized under CWE-284: Improper Access Control.

Critical Impact
Unauthenticated network attackers can obtain complete read access to sensitive master data managed by Oracle Hyperion Data Relationship Management.

Affected Products

Oracle Hyperion Data Relationship Management version 11.2.25.0.000
Component: Access and security
Product family: Oracle Hyperion

Discovery Timeline

2026-08-18 - CVE-2026-70889 published to NVD
2026-08-22 - Last updated in NVD database
August 2026 - Included in the Oracle Critical Patch Update / Security Alert

Technical Details for CVE-2026-70889

Vulnerability Analysis

Oracle Hyperion Data Relationship Management (DRM) centralizes enterprise master data for financial, analytical, and operational systems. The Access and security component enforces authentication and authorization for HTTP-exposed interfaces. This vulnerability weakens that enforcement, allowing a remote attacker to reach protected functionality without valid credentials.

The flaw is easily exploitable and requires no user interaction. It affects confidentiality only; integrity and availability are not impacted. Exploitation can expose master data such as account hierarchies, cost centers, entity structures, and reference data feeding downstream financial reporting systems.

Root Cause

The root cause is improper access control [CWE-284] within the Access and security component of Oracle Hyperion Data Relationship Management 11.2.25.0.000. Access decisions do not adequately restrict unauthenticated HTTP requests to protected resources. Oracle has not published detailed technical internals; refer to the Oracle Security Alert for vendor guidance.

Attack Vector

The attack originates over the network via HTTP against an exposed Oracle Hyperion DRM instance. The attacker sends crafted HTTP requests to endpoints that should require authentication. Because privileges are not required and no user interaction is involved, mass scanning and automated exploitation against internet-exposed instances are feasible.

No public proof-of-concept or exploit code is currently listed for CVE-2026-70889. Refer to Oracle's advisory for the authoritative technical description.

Detection Methods for CVE-2026-70889

Indicators of Compromise

Unauthenticated HTTP requests to Oracle Hyperion DRM endpoints returning 200 OK responses that should require authentication.
Unusual outbound data transfer volumes from Hyperion DRM web tiers to external or unexpected internal hosts.
Access log entries showing enumeration of DRM API paths or object identifiers from a single source IP.

Detection Strategies

Baseline authenticated versus unauthenticated request ratios on DRM web endpoints and alert on anomalies.
Monitor DRM application and IIS/HTTP server logs for requests to sensitive resources lacking a valid session token or authentication header.
Correlate DRM access logs with identity provider logs to identify sessions without a matching authentication event.

Monitoring Recommendations

Forward Oracle Hyperion DRM web server, application, and audit logs to a centralized SIEM for retention and analysis.
Enable verbose access logging on the DRM Access and security component during the exposure window.
Alert on bulk read operations against hierarchies, nodes, or properties that exceed historical user behavior baselines.

How to Mitigate CVE-2026-70889

Immediate Actions Required

Apply the fixes referenced in the Oracle Security Alert of August 2026 to all Hyperion DRM 11.2.25.0.000 deployments.
Restrict network access to Hyperion DRM HTTP interfaces to authorized management networks only.
Review DRM access logs since the disclosure date for signs of unauthorized data retrieval.

Patch Information

Oracle addresses this vulnerability through its Critical Patch Update / Security Alert program. Administrators should download and install the patch bundle listed in the Oracle Security Alert covering Oracle Hyperion Data Relationship Management 11.2.25.0.000. Follow Oracle's documented patch application procedure and validate the DRM Access and security component after upgrade.

Workarounds

Place the Hyperion DRM web interface behind a reverse proxy or web application firewall that enforces authentication before requests reach the application.
Block HTTP access from untrusted networks using firewall or ACL rules until patching is complete.
Disable or limit external exposure of the DRM web tier where operationally feasible.

bash

# Example: restrict Hyperion DRM HTTP access to an internal management subnet
# (adapt interface and subnet values to your environment)
iptables -A INPUT -p tcp --dport 80  -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80  -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP