CVE-2026-70903: Oracle Hyperion DRM Auth Bypass Vulnerability

CVE-2026-70903 Overview

CVE-2026-70903 is an access control vulnerability [CWE-284] in the Oracle Hyperion Data Relationship Management product, specifically within the Access and security component. The affected supported version is 11.2.25.0.000. A low-privileged attacker with network access via HTTPS can exploit this weakness, provided a separate user performs an action such as clicking a crafted link or loading attacker-supplied content. Successful exploitation results in unauthorized creation, deletion, or modification of critical data and unauthorized read access to all data accessible through Oracle Hyperion Data Relationship Management. The scope change indicates that impact can extend beyond the vulnerable component to additional Oracle products.

Critical Impact
Attackers can read, modify, or delete all Hyperion Data Relationship Management accessible data and pivot into adjacent Oracle products through scope change.

Affected Products

Oracle Hyperion Data Relationship Management 11.2.25.0.000
Oracle Hyperion (Access and security component)
Downstream Oracle products reachable through scope change

Discovery Timeline

2026-08-18 - CVE-2026-70903 published to the National Vulnerability Database (NVD)
2026-08-18 - Oracle publishes the Oracle Security Alert August 2026
2026-08-22 - Last updated in NVD database

Technical Details for CVE-2026-70903

Vulnerability Analysis

The flaw resides in the Access and security component of Oracle Hyperion Data Relationship Management (DRM), the master data management module used to govern enterprise financial hierarchies. The vulnerability is classified as Improper Access Control [CWE-284]. Because the CVSS scope is changed, a compromise of DRM propagates authority to resources controlled by another security authority. This effectively lets an authenticated but low-privileged attacker escalate reach beyond the DRM product boundary.

Exploitation is not automatic. The Oracle advisory states that a successful attack requires human interaction from a user other than the attacker. This pattern is consistent with request forgery or link-based attack chains, where the attacker triggers an action executed under the victim's session context.

Impact focuses on confidentiality and integrity. Attackers can read all DRM-accessible data and can create, modify, or delete records that govern financial master data hierarchies. Availability is not directly impacted.

Root Cause

The root cause is improper enforcement of access control in the DRM Access and security component. Authorization checks do not adequately validate the initiating actor, request origin, or scope of permitted operations, allowing a low-privileged principal to induce privileged actions when a second user interacts with attacker-controlled content.

Attack Vector

The attack vector is network-based over HTTPS. The attacker authenticates with low privileges, then delivers a crafted request, link, or embedded resource. A separate authenticated user must interact with that content, at which point the DRM server processes the operation under the victim's authority. Because DRM sits between financial reporting, consolidation, and planning applications, the resulting operations can cascade into connected Oracle Hyperion products.

No public exploit code is available at the time of publication, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2026-70903

Indicators of Compromise

Unexpected hierarchy, node, or property changes in DRM audit logs originating from user sessions that did not initiate the change.
HTTPS requests to DRM endpoints containing external Referer headers or embedded from non-DRM origins.
Bursts of create, delete, or modify operations against critical DRM records performed shortly after a user opened an external link or email.
Cross-application activity where DRM changes are followed by anomalous data movement into connected Hyperion products.

Detection Strategies

Enable and centralize DRM application, authentication, and change-audit logs, and correlate them with web proxy and email gateway telemetry.
Alert on DRM state-changing operations executed from sessions that also loaded external or unusual referrers within a short window.
Baseline per-user DRM write volume and flag statistically significant deviations, especially for administrative or hierarchy-owner accounts.

Monitoring Recommendations

Forward DRM, IIS/WebLogic, and identity provider logs into a centralized analytics platform for cross-source correlation.
Monitor privileged DRM accounts for interactive workflows initiated outside normal business hours or from unusual network segments.
Track scope-crossing activity between DRM and downstream Oracle Hyperion products to identify lateral impact.

How to Mitigate CVE-2026-70903

Immediate Actions Required

Apply the fixes referenced in the Oracle Security Alert August 2026 to Oracle Hyperion Data Relationship Management 11.2.25.0.000.
Restrict network access to DRM interfaces to trusted management networks and authenticated VPN users only.
Review DRM user roles and remove excess privileges from accounts that do not require write access to critical hierarchies.
Instruct DRM users to avoid clicking untrusted links while authenticated to the application.

Patch Information

Oracle addresses this vulnerability as part of the August 2026 Critical Patch Update cycle. Administrators should consult the Oracle Security Alert August 2026 for the applicable patch bundle, prerequisites, and post-installation validation steps for Oracle Hyperion Data Relationship Management.

Workarounds

Enforce short session lifetimes and require re-authentication for privileged DRM operations to reduce the window for cross-user interaction attacks.
Place DRM behind a reverse proxy that strips or validates cross-origin requests and enforces strict Referer and Origin header policies.
Segment DRM from general user workstations and email clients to reduce the likelihood that a victim session and attacker content share a browser context.