CVE-2026-70897: Oracle Hyperion DRM Auth Bypass Vulnerability

CVE-2026-70897 Overview

CVE-2026-70897 is an access control vulnerability in the Oracle Hyperion Data Relationship Management product, within the Access and security component. The flaw affects version 11.2.25.0.000 and allows an unauthenticated attacker with network access via HTTPS to compromise the application. Successful exploitation can result in unauthorized access to all accessible data and unauthorized update, insert, or delete access to a subset of that data. Oracle addressed the issue in the August 2026 Critical Patch Update. The vulnerability is tracked under CWE-284: Improper Access Control.

Critical Impact
Unauthenticated network attackers can read all Oracle Hyperion Data Relationship Management data and modify a subset of it over HTTPS with low attack complexity.

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 HTTPS interface

Discovery Timeline

2026-08-18 - CVE-2026-70897 published to the National Vulnerability Database (NVD)
2026-08-22 - Last updated in the NVD database
August 2026 - Oracle publishes the Oracle Security Alert August 2026 with the corresponding fix

Technical Details for CVE-2026-70897

Vulnerability Analysis

The vulnerability resides in the Access and security component of Oracle Hyperion Data Relationship Management. It is classified as improper access control [CWE-284], meaning the application fails to correctly enforce authorization checks on requests reaching the HTTPS interface. An unauthenticated attacker with network reachability to the application can invoke privileged functionality or query data intended for authenticated users. The scope remains unchanged, but confidentiality impact is high while integrity impact is limited to a subset of data. Availability is not affected. The EPSS probability for near-term exploitation is 0.321%.

Root Cause

According to Oracle's advisory, the defect lies in how the Access and security component validates requests against required privileges. The control gap permits actions without verifying the caller's authenticated identity or role. Because no user interaction is required and privileges are not needed to reach the vulnerable code path, exposure of the HTTPS listener to untrusted networks materially increases risk.

Attack Vector

Exploitation occurs remotely over HTTPS against the Data Relationship Management application. The attacker sends crafted requests to endpoints that should require authentication or elevated privileges. Successful requests return sensitive Hyperion data or perform unauthorized create, update, or delete operations on records the attacker should not control. Oracle has not published exploit details, and no public proof-of-concept is currently referenced in the CVE record. Refer to the Oracle Security Alert August 2026 for vendor guidance.

Detection Methods for CVE-2026-70897

Indicators of Compromise

Unauthenticated HTTPS requests to Data Relationship Management API endpoints originating from external or non-administrative source addresses.
Bulk read operations, exports, or record modifications performed outside of scheduled ETL windows or by unexpected service accounts.
Application or web-tier logs showing successful responses to requests that lack a valid session cookie or authorization header.

Detection Strategies

Compare authenticated session identifiers against the requests that produced sensitive data responses. Any mismatch indicates possible access control bypass.
Baseline normal Data Relationship Management API call volumes and alert on anomalous read or write bursts against master data hierarchies.
Correlate web application firewall (WAF) telemetry, application logs, and database audit trails to identify request chains that skip authentication steps.

Monitoring Recommendations

Enable verbose access logging on the Data Relationship Management HTTPS listener and forward logs to a centralized SIEM for retention and correlation.
Monitor for unexpected changes to Hyperion metadata, hierarchies, and property values, especially outside change windows.
Track egress traffic volumes from the application server; large outbound transfers can indicate mass data extraction.

How to Mitigate CVE-2026-70897

Immediate Actions Required

Apply the fix from the Oracle Security Alert August 2026 to all Oracle Hyperion Data Relationship Management 11.2.25.0.000 deployments.
Restrict network reachability to the Data Relationship Management HTTPS interface to trusted administrative networks only.
Rotate service credentials and review recent audit logs for unauthorized data access or modification.

Patch Information

Oracle addressed CVE-2026-70897 in the August 2026 Critical Patch Update. Administrators should review the Oracle Security Alert August 2026 for the exact patch identifiers, prerequisites, and installation instructions applicable to their Hyperion environment. Apply the update in a test environment first, then roll out to production following Oracle's documented procedure.

Workarounds

Place the Data Relationship Management application behind a reverse proxy or WAF that enforces authentication before requests reach the application tier.
Limit HTTPS access with network-layer controls such as firewall rules, VPN gating, or zero-trust access policies while patching is scheduled.
Disable or tightly restrict any anonymous or guest access options in the Access and security component configuration until the patch is applied.

bash

# Configuration example: restrict HTTPS access to Data Relationship Management
# Example iptables rule allowing only a trusted admin subnet to reach TCP/443
iptables -A INPUT -p tcp --dport 443 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP