CVE-2026-70898: Oracle Hyperion DRM Auth Bypass Vulnerability

CVE-2026-70898 Overview

CVE-2026-70898 is an improper access control vulnerability [CWE-284] in Oracle Hyperion Data Relationship Management version 11.2.25.0.000. The flaw resides in the Access and security component. An unauthenticated attacker with network access via HTTP can compromise the application, though exploitation is difficult. Successful attacks allow unauthorized creation, deletion, or modification of critical data, as well as unauthorized read access to all data accessible to Oracle Hyperion Data Relationship Management. Oracle addressed the issue in the August 2026 Critical Patch Update.

Critical Impact
Unauthenticated network attackers can read, modify, or delete all data accessible to Oracle Hyperion Data Relationship Management, undermining the integrity of enterprise master data management workflows.

Affected Products

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

Discovery Timeline

2026-08-18 - CVE-2026-70898 published to the National Vulnerability Database (NVD)
2026-08-22 - Last updated in NVD database
August 2026 - Addressed in the Oracle Security Alert - August 2026

Technical Details for CVE-2026-70898

Vulnerability Analysis

The vulnerability affects the Access and security component of Oracle Hyperion Data Relationship Management. Improper access control [CWE-284] allows an unauthenticated remote attacker to reach protected functionality over HTTP. The flaw impacts confidentiality and integrity, but not availability.

Oracle rates the attack complexity as high, meaning the attacker must satisfy specific conditions outside their direct control. Despite this barrier, no authentication or user interaction is required. Successful exploitation exposes master data governed by the platform.

Root Cause

The root cause is improper enforcement of access controls within the application's security layer. The component fails to consistently validate that requesters are authorized before granting access to protected resources. This class of weakness typically stems from missing authorization checks on specific endpoints, inconsistent trust boundaries, or logic flaws that permit an unauthenticated session to reach privileged operations.

Attack Vector

An attacker sends crafted HTTP requests to an internet- or intranet-reachable Oracle Hyperion Data Relationship Management instance. No credentials or user interaction are required. Because exploitation is scoped to the vulnerable component, the impact stays within Oracle Hyperion Data Relationship Management, but includes complete read, write, and delete access to accessible data.

No public proof-of-concept code is available. Refer to the Oracle Security Alert - August 2026 for vendor-provided technical context.

Detection Methods for CVE-2026-70898

Indicators of Compromise

Unexpected HTTP requests to Oracle Hyperion Data Relationship Management endpoints from unauthenticated sources
Anomalous create, update, or delete operations on hierarchies, nodes, or properties within Data Relationship Management
Access to sensitive master data records without a preceding successful authentication event
Outbound data transfer patterns from Hyperion servers that do not match documented integration workflows

Detection Strategies

Baseline normal HTTP request patterns to Hyperion Data Relationship Management and alert on deviations from authenticated user activity
Correlate application audit logs with authentication logs to surface data operations performed without a valid session
Monitor for administrative or metadata-changing actions originating outside sanctioned service accounts

Monitoring Recommendations

Forward Hyperion application, IIS, and web server logs to a centralized analytics platform for correlation
Track integrity of master data records and alert on bulk modifications or deletions
Instrument network segmentation to log all inbound HTTP traffic reaching the Data Relationship Management tier

How to Mitigate CVE-2026-70898

Immediate Actions Required

Apply the patches referenced in the Oracle Security Alert - August 2026 to all Oracle Hyperion Data Relationship Management 11.2.25.0.000 deployments
Inventory all Hyperion instances, including non-production environments, to confirm patch coverage
Restrict HTTP access to the application to authorized management networks only
Review recent audit logs for suspicious data modifications or unauthorized queries

Patch Information

Oracle released fixes for CVE-2026-70898 as part of the August 2026 Critical Patch Update cycle. Administrators should install the vendor-supplied update for Oracle Hyperion Data Relationship Management 11.2.25.0.000. See the Oracle Security Alert - August 2026 for the specific patch identifiers and installation guidance.

Workarounds

Place Oracle Hyperion Data Relationship Management behind a reverse proxy or web application firewall that enforces authentication before requests reach the application
Limit network exposure by binding the service to internal interfaces and blocking direct external HTTP access
Enforce network segmentation so only approved application and integration hosts can reach the Data Relationship Management tier
Increase audit log retention and review frequency until the vendor patch is applied

bash

# Example: restrict inbound HTTP access to the Hyperion DRM tier using iptables
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