CVE-2026-70886: Oracle Hyperion DRM Auth Bypass Vulnerability

CVE-2026-70886 Overview

CVE-2026-70886 is a high-severity access control vulnerability in the Oracle Hyperion Data Relationship Management product. The flaw resides in the Access and security component and affects version 11.2.25.0.000. An authenticated attacker with low privileges can exploit the issue over HTTP to fully compromise the affected system.

The vulnerability is classified under [CWE-284: Improper Access Control]. Successful exploitation results in complete takeover of Oracle Hyperion Data Relationship Management, impacting confidentiality, integrity, and availability.

Critical Impact
A low-privileged attacker with network access via HTTP can achieve full takeover of Oracle Hyperion Data Relationship Management, compromising financial master data and hierarchies.

Affected Products

Oracle Hyperion Data Relationship Management 11.2.25.0.000
Component: Access and security
Deployments exposing the Hyperion DRM web interface over HTTP/HTTPS

Discovery Timeline

2026-08-18 - CVE-2026-70886 published to the National Vulnerability Database
2026-08-18 - Oracle publishes Security Alert Advisory cspuaug2026
2026-08-21 - Last updated in NVD database

Technical Details for CVE-2026-70886

Vulnerability Analysis

Oracle Hyperion Data Relationship Management (DRM) is an enterprise master data management platform used to govern hierarchies, mappings, and reference data across financial and analytical systems. The vulnerability affects the Access and security component, which enforces authentication and authorization decisions across DRM operations.

The flaw allows a low-privileged authenticated user to bypass intended access restrictions. Because the Access and security component brokers permissions for reading and modifying master data, a bypass grants the attacker capabilities reserved for higher-privileged roles. The attack requires only network access via HTTP and no user interaction.

Oracle's advisory characterizes the vulnerability as easily exploitable, and successful attacks result in full takeover of the DRM instance. This includes unauthorized read and write access to hierarchy definitions, node properties, and audit data.

Root Cause

The root cause is improper access control [CWE-284] within the Access and security component of Oracle Hyperion Data Relationship Management. Authorization checks fail to correctly enforce role or privilege boundaries for authenticated HTTP requests, allowing a low-privileged user to execute actions outside their assigned scope.

Attack Vector

The attack vector is network-based over HTTP. An attacker requires valid credentials for any low-privileged DRM account. After authenticating, the attacker sends crafted HTTP requests against the DRM application to invoke privileged operations or access restricted data. No social engineering or victim interaction is required.

Oracle has not published exploitation code or technical proof-of-concept details. See the Oracle Security Alert August 2026 for vendor guidance.

Detection Methods for CVE-2026-70886

Indicators of Compromise

Unexpected privilege escalations or role assignments in DRM audit logs from low-privileged accounts
HTTP requests to administrative DRM endpoints originating from non-administrative user sessions
Anomalous hierarchy modifications, node deletions, or bulk export operations outside normal change windows
New or modified DRM user accounts, application permissions, or property definitions not tied to change tickets

Detection Strategies

Enable and centralize DRM application and web-tier audit logs, then baseline normal per-role activity to flag deviations
Correlate authenticated DRM HTTP traffic with user role assignments to identify requests that exceed the caller's documented privileges
Alert on administrative API calls, metadata exports, or hierarchy structural changes performed by non-administrator accounts

Monitoring Recommendations

Forward DRM, IIS/web server, and database audit logs to a SIEM for correlation across the application stack
Monitor authentication logs for credential stuffing or brute force against DRM login endpoints that could seed exploitation
Track outbound data volumes from DRM servers to detect unauthorized bulk extraction of master data

How to Mitigate CVE-2026-70886

Immediate Actions Required

Apply the patches referenced in the Oracle Security Alert August 2026 to all affected Hyperion DRM instances
Inventory all Oracle Hyperion Data Relationship Management 11.2.25.0.000 deployments, including non-production environments
Restrict network access to DRM web interfaces to trusted management networks and VPN clients only
Review DRM user accounts and disable inactive or unnecessary low-privileged accounts that could be used to authenticate

Patch Information

Oracle addresses CVE-2026-70886 in the August 2026 Security Alert. Administrators should download and apply the DRM-specific patch identified in the Oracle Security Alert August 2026. Oracle recommends applying Critical Patch Update and Security Alert fixes without delay, as they contain protections against known attack techniques.

Workarounds

Place DRM behind a reverse proxy or web application firewall that enforces strict authentication and per-role URL access controls
Enforce multi-factor authentication for all DRM users, including read-only and low-privileged accounts, to raise the bar for attackers with stolen credentials
Rotate credentials for any accounts suspected of exposure and audit recent DRM administrative actions before patching
If patching is delayed, isolate DRM servers from general corporate network access and restrict inbound HTTP traffic by source IP

bash

# Example: restrict inbound HTTP/HTTPS access to DRM to a management subnet (Windows firewall)
netsh advfirewall firewall add rule name="DRM-Restrict-HTTP" ^
  dir=in action=allow protocol=TCP localport=80,443 ^
  remoteip=10.10.20.0/24
netsh advfirewall firewall add rule name="DRM-Block-HTTP-Other" ^
  dir=in action=block protocol=TCP localport=80,443