CVE-2026-70881: Oracle Hyperion DRM Auth Bypass Vulnerability

CVE-2026-70881 Overview

CVE-2026-70881 is a broken access control vulnerability in Oracle Hyperion Data Relationship Management, part of the Oracle Hyperion product family. The flaw resides in the Access and security component of version 11.2.25.0.000. A low-privileged attacker with network access via HTTP can exploit the vulnerability without user interaction. Successful exploitation allows unauthorized read access, creation, deletion, and modification of data managed by Oracle Hyperion Data Relationship Management. Oracle disclosed the issue in the Oracle Security Alert August 2026.

Critical Impact
An authenticated attacker with minimal privileges can compromise confidentiality and integrity of all data accessible to Oracle Hyperion Data Relationship Management over the network.

Affected Products

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

Discovery Timeline

2026-08-18 - CVE-2026-70881 published to the National Vulnerability Database
2026-08-18 - Oracle Security Alert August 2026 released
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-70881

Vulnerability Analysis

The vulnerability affects the Access and security component of Oracle Hyperion Data Relationship Management. The component is responsible for enforcing authorization decisions across data hierarchies, versions, and metadata managed by the platform. A weakness in this enforcement layer allows a low-privileged authenticated user to perform operations that should be restricted to higher-privileged roles.

The flaw is categorized as broken access control. Exploitation does not require elevated privileges, complex conditions, or user interaction. The attacker interacts with the application over HTTP, which is the standard delivery channel for Hyperion DRM operations.

Oracle assigns confidentiality and integrity impacts as High and availability impact as None. This aligns with the observed behavior of unauthorized data disclosure and unauthorized modification of records within the scope of the application.

Root Cause

The root cause is improper enforcement of authorization within the Access and security component. Requests originating from a low-privileged session are not fully validated against the sensitivity of the target object or operation. The application processes the request as if the caller held sufficient rights.

Attack Vector

An attacker authenticates with any valid low-privileged account and issues crafted HTTP requests against the Hyperion DRM server. The requests target endpoints or object identifiers that the account should not be permitted to read or modify. Because Oracle has not published exploit details, technical specifics of the crafted request patterns are not public. Refer to the Oracle Security Alert August 2026 for vendor guidance.

Detection Methods for CVE-2026-70881

Indicators of Compromise

Unexpected creation, modification, or deletion of DRM records, hierarchies, or versions by low-privileged accounts
HTTP requests from standard user accounts to administrative or high-privilege DRM endpoints
Anomalous export or bulk read operations initiated from non-administrative sessions
Authorization denial events followed shortly by successful equivalent operations from the same session

Detection Strategies

Enable and centralize Hyperion DRM audit logs covering authentication, authorization decisions, and record-level changes
Correlate DRM application logs with web server and reverse-proxy HTTP request logs to reconstruct request sequences
Baseline normal user behavior by role and alert on deviations such as privileged actions from standard accounts
Review recent role assignments and access grants for accounts that performed unusual operations

Monitoring Recommendations

Forward Hyperion DRM and application server logs to a centralized SIEM for retention and correlation
Monitor low-privileged accounts for creation, deletion, and modification events on sensitive metadata
Alert on repeated 4xx responses followed by 2xx responses on the same endpoint from the same session
Track service account and integration account activity for unauthorized data access

How to Mitigate CVE-2026-70881

Immediate Actions Required

Apply the fixes referenced in the Oracle Security Alert August 2026 to all affected Hyperion DRM instances
Inventory Hyperion DRM deployments and confirm the running version, prioritizing 11.2.25.0.000
Restrict network access to the Hyperion DRM HTTP interface to trusted management networks
Review and reduce accounts that hold access to the DRM application, removing dormant or unnecessary users

Patch Information

Oracle addressed CVE-2026-70881 in the August 2026 security update cycle. Customers should download and apply the patch bundle described in the Oracle Security Alert August 2026. Oracle recommends applying critical patch updates without delay, since exploit code frequently follows public disclosure.

Workarounds

Place Hyperion DRM behind a reverse proxy that enforces authentication and IP allow-listing
Enforce least privilege by auditing DRM roles and removing broad or legacy permissions
Require multi-factor authentication for all accounts that can reach the DRM HTTP interface
Segment the Hyperion DRM host from general user networks to limit exposure to authenticated attackers

bash

# Example: restrict HTTP access to Hyperion DRM at the reverse proxy
# Allow only the management subnet to reach the DRM endpoint
location /drm/ {
    allow 10.20.30.0/24;
    deny all;
    proxy_pass http://hyperion-drm-backend;
}