CVE-2026-87250: Oracle Hyperion Auth Bypass Vulnerability

CVE-2026-87250 Overview

CVE-2026-87250 is an access control weakness in the Security component of Oracle Hyperion Financial Management. The affected supported version is 11.2.26.0.000. An authenticated attacker with low privileges can exploit the flaw over HTTP when a separate user performs an interactive action. Successful exploitation leads to a scope change, extending impact beyond Hyperion Financial Management to other products. Oracle categorizes the issue under improper access control [CWE-284].

Critical Impact
Attackers can gain unauthorized access to all Hyperion Financial Management data and modify a subset of that data, with impact crossing security scope boundaries into additional Oracle products.

Affected Products

Oracle Hyperion Financial Management 11.2.26.0.000
Oracle Hyperion (Security component)
Downstream Oracle products reachable through the scope-change condition

Discovery Timeline

2026-09-15 - CVE-2026-87250 published to the National Vulnerability Database
2026-09-17 - Last updated in NVD database
Oracle Security Alert CSPUSEP2026 - Vendor advisory published

Technical Details for CVE-2026-87250

Vulnerability Analysis

The vulnerability resides in the Security component of Oracle Hyperion Financial Management, an enterprise financial consolidation and reporting platform. Oracle classifies the weakness as improper access control [CWE-284]. The flaw allows a low-privileged authenticated user to trigger actions that violate the intended security boundary. Because exploitation results in a scope change, effects extend beyond Hyperion Financial Management into other integrated products. The confidentiality impact is high while the integrity impact is limited to a subset of data, and availability is not affected.

Root Cause

The root cause is improper enforcement of access control checks within the Security component. The application does not sufficiently restrict what a low-privileged principal can request or reference when a second user interacts with the application. This design gap enables authorization decisions to be influenced by attacker-controlled input during another user's session, producing cross-scope effects.

Attack Vector

The attack is network-reachable over HTTP and requires the attacker to hold a valid low-privileged account. Exploitation additionally requires human interaction from a different user, consistent with a workflow where an authenticated administrator or peer visits or processes attacker-supplied content. Once triggered, the attacker gains broad read access to Hyperion Financial Management data and limited write, insert, or delete capability, with impact crossing into adjacent products through the scope change. No public proof-of-concept exploit is available at this time, and the issue is not listed in the CISA Known Exploited Vulnerabilities catalog.

Oracle has not published exploitation details. Refer to the Oracle Security Alert CSPUSEP2026 for vendor guidance.

Detection Methods for CVE-2026-87250

Indicators of Compromise

Unexpected HTTP requests to Hyperion Financial Management Security component endpoints originating from low-privileged accounts
Authentication events showing low-privileged users triggering actions that resolve under a higher-privileged user's session
Unusual read access patterns against sensitive financial consolidation data followed by targeted write, insert, or delete operations
Cross-application activity where a Hyperion session correlates with access events in adjacent Oracle products

Detection Strategies

Baseline normal HTTP request patterns for the Security component and alert on deviations from low-privileged accounts
Correlate application-level audit logs with web server access logs to identify user-interaction-driven request chains
Alert on any bulk export or query operations executed by accounts without a business justification for wide data access

Monitoring Recommendations

Enable and forward Hyperion Financial Management application audit logs to a centralized analytics platform
Monitor privileged session activity for actions initiated shortly after receiving links, email, or workflow items from low-privileged users
Track authentication anomalies and cross-scope data access spanning Hyperion and integrated Oracle products

How to Mitigate CVE-2026-87250

Immediate Actions Required

Apply the fix referenced in Oracle Security Alert CSPUSEP2026 as soon as change control permits
Inventory all Hyperion Financial Management deployments running 11.2.26.0.000 and prioritize internet-exposed or broadly accessible instances
Review and reduce standing low-privilege access to Hyperion Financial Management for accounts that do not require it
Brief administrators and finance users on the human-interaction requirement so they scrutinize unexpected links or workflow prompts

Patch Information

Oracle published guidance in the Oracle Security Alert CSPUSEP2026 covering CVE-2026-87250. Administrators should consult the alert for the exact patch bundle applicable to Hyperion Financial Management 11.2.26.0.000 and apply it through Oracle's standard patching process. See the Oracle Security Alert CSPUSEP2026 for the authoritative advisory.

Workarounds

Restrict network access to Hyperion Financial Management HTTP endpoints using firewall rules, VPN gating, or reverse proxy allow-lists
Enforce least privilege on Hyperion accounts and remove unused low-privileged users pending patch deployment
Require multi-factor authentication for all Hyperion Financial Management access to raise the cost of credential compromise
Increase monitoring of privileged users who could be targeted by the required interaction step

bash

# Example: restrict Hyperion Financial Management HTTP access to an admin subnet
iptables -A INPUT -p tcp --dport 443 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP