CVE-2026-87200: Oracle Hyperion Financial Management Bypass

CVE-2026-87200 Overview

CVE-2026-87200 is a network-exploitable vulnerability in the Security component of Oracle Hyperion Financial Management. The affected version is 11.2.26.0.000. An unauthenticated attacker with HTTP network access can compromise the application without user interaction. Successful exploitation grants unauthorized create, delete, or modify access to critical data across the application and can trigger a partial denial of service. Oracle disclosed the issue in the Oracle Security Alert CSPUSEP2026 bulletin.

Critical Impact
Unauthenticated attackers can modify or delete financial data and cause partial service disruption across Oracle Hyperion Financial Management deployments.

Affected Products

Oracle Hyperion Financial Management 11.2.26.0.000
Oracle Hyperion product family (Security component)
Deployments exposing Hyperion HTTP interfaces to untrusted networks

Discovery Timeline

2026-09-15 - CVE-2026-87200 published to NVD
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-87200

Vulnerability Analysis

The flaw resides in the Security component of Oracle Hyperion Financial Management. Oracle classifies the issue as easily exploitable over the network using HTTP. The vulnerability requires no authentication, no privileges, and no user interaction. Attack complexity is low, meaning exploitation does not depend on race conditions or environmental prerequisites.

Impact focuses on integrity and availability. Attackers gain the ability to create, delete, or modify all data accessible to Hyperion Financial Management. Because Hyperion Financial Management processes consolidation, reporting, and regulatory disclosure data, unauthorized modification can corrupt financial records. The availability impact is partial, allowing degradation but not full outage of the service.

Root Cause

Oracle has not published detailed technical root cause information in the Security Alert CSPUSEP2026 bulletin. The Security component designation and the unauthenticated network attack path indicate a flaw in authentication, authorization, or input handling within HTTP-facing endpoints. No CWE identifier has been assigned in the NVD record.

Attack Vector

The attack vector is network-based over HTTP. An attacker sends crafted HTTP requests to a reachable Hyperion Financial Management endpoint. Because authentication is not required, exposure of the Hyperion web interface to untrusted networks materially increases risk. The EPSS score is 0.293% at the 21.9 percentile, reflecting current exploitation likelihood at time of publication.

No public proof-of-concept exploit or CISA KEV listing is available at publication. Refer to the Oracle Security Alert CSPUSEP2026 for vendor-supplied technical guidance.

Detection Methods for CVE-2026-87200

Indicators of Compromise

Unauthenticated HTTP requests to Hyperion Financial Management Security endpoints originating from unexpected sources
Unexpected modification, creation, or deletion of financial consolidation records, dimensions, or metadata
Anomalous administrative or security configuration changes without an associated authenticated session
Application errors or partial service degradation in Hyperion HTTP components

Detection Strategies

Enable verbose HTTP access and application logging on Hyperion Financial Management servers and forward to a central log platform
Baseline normal request patterns to Security component URIs and alert on deviations in method, path, or payload size
Correlate database-level change events with authenticated user sessions to surface changes made outside legitimate workflows
Deploy web application firewall rules to inspect requests to Hyperion endpoints for unauthenticated privileged operations

Monitoring Recommendations

Monitor for HTTP 200 responses on Security component endpoints from clients that never completed authentication
Alert on any bulk create, modify, or delete operations against financial data outside scheduled maintenance windows
Track availability metrics for Hyperion services and investigate partial outages that coincide with anomalous request bursts
Review privileged account activity logs daily during the exposure window

How to Mitigate CVE-2026-87200

Immediate Actions Required

Apply the patch referenced in Oracle Security Alert CSPUSEP2026 to all Oracle Hyperion Financial Management 11.2.26.0.000 instances
Restrict network access to Hyperion HTTP interfaces to trusted management segments and known client subnets
Audit financial data records for unauthorized changes since the exposure window began
Rotate administrative credentials and review Security component configuration for tampering

Patch Information

Oracle addressed the vulnerability in the out-of-cycle Security Alert CSPUSEP2026 bulletin. Administrators should download and apply the fix from the Oracle Security Alert CSPUSEP2026 advisory. Verify patch application against Oracle's documented version checks before restoring public access.

Workarounds

Place Hyperion Financial Management behind a reverse proxy or web application firewall that enforces authentication before requests reach the application
Block external access to Hyperion HTTP endpoints at the network perimeter until patches are applied
Enforce IP allowlisting for administrative and reporting client access
Increase logging retention and alerting thresholds until remediation is verified

bash

# Configuration example: restrict Hyperion HTTP access at the perimeter
# Replace <hyperion_host> and <trusted_subnet> with environment-specific values
iptables -A INPUT -p tcp --dport 443 -s <trusted_subnet> -d <hyperion_host> -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -d <hyperion_host> -j DROP