CVE-2026-87142: Oracle Hyperion DRM Auth Bypass Vulnerability

CVE-2026-87142 Overview

CVE-2026-87142 is a network-exploitable vulnerability in the Access and security component of Oracle Hyperion Data Relationship Management. The affected supported version is 11.2.26.0.000. An unauthenticated attacker with HTTPS network access can compromise the product when a user other than the attacker performs an action. Successful exploitation grants unauthorized creation, deletion, or modification of critical data across all Oracle Hyperion Data Relationship Management accessible data, and can cause a partial denial of service. Oracle published the fix in the Critical Patch Update Security Alert CSPUSEP2026.

Critical Impact

Unauthenticated attackers can modify or delete critical Hyperion Data Relationship Management data and trigger partial denial of service after tricking a user into an unsafe interaction.

Affected Products

• Oracle Hyperion Data Relationship Management 11.2.26.0.000
• Oracle Hyperion product family (Access and security component)
• Deployments exposing Hyperion DRM over HTTPS to reachable networks

Discovery Timeline

• 2026-09-15 - CVE-2026-87142 published to NVD
• 2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-87142

Vulnerability Analysis

The flaw resides in the Access and security component of Oracle Hyperion Data Relationship Management (DRM), the master data management platform used to govern hierarchies and reference data for enterprise finance systems. An unauthenticated remote attacker can send crafted HTTPS traffic that, once acted upon by another user, causes the application to perform integrity-affecting operations under that user's context. The attack does not require credentials on the target, but it does require user interaction from a victim who holds access to the DRM instance.

Successful exploitation yields high integrity impact and low availability impact, with no direct impact to confidentiality. Attackers gain unauthorized create, delete, and modify access across all data reachable through the DRM instance, and can degrade service to a partial denial of service state. Because Hyperion DRM governs authoritative hierarchies consumed by downstream financial reporting and consolidation systems, unauthorized modifications can propagate into general ledger, planning, and consolidation workloads.

Root Cause

Oracle's advisory attributes the issue to the Access and security component but does not disclose the underlying defect class. The requirement for user interaction combined with unauthenticated network reach is consistent with a client-mediated request forgery or unsafe request handling condition in an authenticated user's session. Refer to the Oracle Security Alert CSPUSEP2026 for authoritative technical detail.

Attack Vector

The attack vector is network-based over HTTPS. An attacker crafts a malicious request or lure and induces an authorized Hyperion DRM user to trigger it, for example through a phishing link or a hosted page. The victim's session then carries out the state-changing operation against the DRM server, resulting in data modification or partial service disruption. No local access, elevated privileges, or prior credentials are required on the target host.

Detection Methods for CVE-2026-87142

Indicators of Compromise

• Unexpected create, update, or delete operations against DRM hierarchies, nodes, or property values outside change-management windows.
• HTTPS requests to Hyperion DRM endpoints originating from unusual Referer headers or external browser sessions.
• User accounts performing high-volume administrative changes inconsistent with their historical role behavior.
• Partial service degradation events, timeouts, or component restarts on the Hyperion DRM application server.

Detection Strategies

• Correlate DRM audit logs with web server access logs to identify state-changing requests that lack expected origin or workflow context.
• Alert on interactive user sessions that trigger bulk data modification API calls within short time windows.
• Baseline normal DRM administrative activity per user and role, then flag deviations for review.

Monitoring Recommendations

• Forward Hyperion DRM audit trails, IIS or web tier logs, and application logs into a centralized analytics platform for correlation.
• Monitor authentication events and session lifetimes for DRM users, focusing on unusual concurrent sessions.
• Track availability metrics of the DRM service to detect partial denial of service conditions early.

How to Mitigate CVE-2026-87142

Immediate Actions Required

• Apply the fixes published in Oracle Security Alert CSPUSEP2026 to all Hyperion Data Relationship Management 11.2.26.0.000 instances.
• Inventory internet-reachable Hyperion DRM deployments and restrict exposure to trusted networks pending patching.
• Notify DRM users of the interaction-driven attack pattern and reinforce guidance against opening untrusted links while authenticated.

Patch Information

Oracle addressed CVE-2026-87142 in the Critical Patch Update Security Alert CSPUSEP2026. Administrators should download and deploy the patch corresponding to Oracle Hyperion Data Relationship Management version 11.2.26.0.000 from My Oracle Support and validate the fix in a staging environment before production rollout.

Workarounds

• Place the Hyperion DRM web tier behind a reverse proxy or VPN to remove direct HTTPS exposure from untrusted networks.
• Enforce short session timeouts and require re-authentication for privileged DRM operations.
• Restrict DRM administrative roles to a minimal set of users and require change-approval workflows for hierarchy modifications.
• Deploy web application firewall rules to inspect and block cross-origin state-changing requests targeting DRM endpoints.