CVE-2026-87131: Oracle Hyperion DRM Auth Bypass Vulnerability

CVE-2026-87131 Overview

CVE-2026-87131 is a vulnerability in the Oracle Hyperion Data Relationship Management product within the Oracle Hyperion suite. The flaw resides in the Access and security component and affects version 11.2.26.0.000. A low-privileged attacker with network access via HTTP can exploit the issue, though successful attacks require human interaction from a user other than the attacker. Because the vulnerability produces a scope change, exploitation may impact additional products beyond Hyperion Data Relationship Management. Successful attacks can result in unauthorized access to critical data, and unauthorized update, insert, or delete access to a subset of accessible data.

Critical Impact
An authenticated, low-privileged attacker can compromise confidentiality of all accessible Hyperion Data Relationship Management data and modify a subset of it, with impact extending beyond the vulnerable component due to scope change.

Affected Products

Oracle Hyperion Data Relationship Management 11.2.26.0.000
Component: Access and security
Deployments exposing the Hyperion Data Relationship Management HTTP interface to reachable users

Discovery Timeline

2026-09-15 - CVE-2026-87131 published to the National Vulnerability Database (NVD)
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-87131

Vulnerability Analysis

The vulnerability affects the Access and security component of Oracle Hyperion Data Relationship Management. An authenticated attacker with low privileges can send crafted HTTP requests to the application. Exploitation requires a separate authenticated user to interact with attacker-influenced content, which triggers the flaw in that user's session context. The scope change indicates the security impact extends beyond the vulnerable component's authorization boundary, allowing an attacker to affect resources managed by other components or products integrated with Hyperion Data Relationship Management. Successful exploitation yields complete read access to Hyperion Data Relationship Management data and partial write access to accessible records.

Root Cause

Oracle's advisory does not publish detailed root-cause information for this issue. The combination of network attack vector, low privileges, required user interaction, and scope change is consistent with a client-side injection or cross-context request flaw within the authentication and authorization layer of the Access and security component. Refer to the Oracle Security Alert for vendor-supplied technical context.

Attack Vector

The attacker requires network reachability to the Hyperion Data Relationship Management HTTP interface and valid low-privileged credentials. The attacker crafts a malicious request or link and induces a higher-privileged user to interact with it. When the victim interacts, the request executes with the victim's authority, allowing the attacker to read data across the application and modify a subset of records. Because scope changes, resources controlled by adjacent components may also be affected.

No verified public proof-of-concept code is available for CVE-2026-87131. See the Oracle Security Alert for authoritative details.

Detection Methods for CVE-2026-87131

Indicators of Compromise

Unexpected HTTP requests to Hyperion Data Relationship Management endpoints originating from low-privileged user sessions immediately followed by privileged actions.
Bulk read or export activity against Data Relationship Management records outside normal business hours or usage baselines.
Unusual update, insert, or delete operations initiated from user accounts that historically only perform reads.

Detection Strategies

Correlate authentication logs with subsequent HTTP request patterns to identify sessions where a low-privileged user's action precedes privileged data access by another account.
Baseline normal Hyperion Data Relationship Management API and UI request patterns per role, and alert on deviations that suggest interaction-triggered exploitation.
Inspect referrer and user-agent headers on Data Relationship Management HTTP traffic for cross-origin patterns consistent with a victim clicking attacker-controlled content.

Monitoring Recommendations

Forward Hyperion Data Relationship Management web server, application, and audit logs to a centralized analytics platform for behavioral analysis.
Enable Data Relationship Management change auditing for hierarchies, nodes, and property values to reconstruct any unauthorized modifications.
Monitor privileged administrative accounts for anomalous session activity following interactions with links or content from other internal users.

How to Mitigate CVE-2026-87131

Immediate Actions Required

Apply the fixes referenced in the Oracle Security Alert to all Hyperion Data Relationship Management 11.2.26.0.000 deployments.
Restrict network access to the Hyperion Data Relationship Management HTTP interface to trusted administrative networks only.
Review and reduce privileges for Hyperion Data Relationship Management accounts, enforcing least privilege for the Access and security component.
Educate Hyperion Data Relationship Management users, especially administrators, on the risk of clicking untrusted links or content while authenticated.

Patch Information

Oracle addresses this issue in its scheduled security update cycle. Consult the Oracle Security Alert for the specific patch, bundle, or interim update that remediates CVE-2026-87131 on version 11.2.26.0.000. Apply the patch in a test environment before promoting to production.

Workarounds

Place the Hyperion Data Relationship Management web tier behind a reverse proxy or web application firewall configured to strip or validate suspicious HTTP request patterns targeting the Access and security component.
Enforce short session timeouts and re-authentication for privileged Data Relationship Management operations to reduce the window for interaction-based exploitation.
Require administrators to use a dedicated browser profile or workstation when accessing Hyperion Data Relationship Management, isolating it from general web browsing.

Refer to the Oracle Security Alert for vendor-recommended configuration guidance specific to CVE-2026-87131.