CVE-2026-70787: Oracle Hyperion Financial Reporting RCE

CVE-2026-70787 Overview

CVE-2026-70787 is a network-exploitable vulnerability in the Oracle Hyperion Financial Reporting product, specifically within the Server component of Oracle Hyperion. The affected supported version is 11.2.25.0.000. An attacker with low privileges and HTTP access to the server can compromise the application and take over the Oracle Hyperion Financial Reporting instance.

Oracle rates this issue with a CVSS 3.1 Base Score of 8.8, reflecting high impact on confidentiality, integrity, and availability. The EPSS score is 0.328% (25.87 percentile) as of 2026-08-20.

Critical Impact
Successful exploitation results in full takeover of Oracle Hyperion Financial Reporting, exposing sensitive financial reporting data and enabling unauthorized modification of reports.

Affected Products

Oracle Hyperion Financial Reporting version 11.2.25.0.000
Oracle Hyperion Server component
Deployments accessible over HTTP to authenticated users

Discovery Timeline

2026-08-18 - CVE-2026-70787 published to the National Vulnerability Database (NVD)
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-70787

Vulnerability Analysis

The flaw resides in the Server component of Oracle Hyperion Financial Reporting. Oracle describes the issue as easily exploitable, requiring only network access via HTTP and low-level authenticated privileges. No user interaction is required to trigger the vulnerability.

Successful exploitation leads to complete compromise of the Hyperion Financial Reporting instance. Attackers gain the ability to read, modify, and disrupt financial reporting workloads. Because Hyperion Financial Reporting is used for regulated financial disclosures, integrity impact carries downstream compliance and audit implications.

Root Cause

Oracle has not published a detailed technical root cause in the public advisory. The vendor advisory categorizes the issue within the Oracle Hyperion Server component and confirms scope is unchanged, indicating the impact is contained within the vulnerable application's security authority. Refer to the Oracle Security Alert for vendor-issued details.

Attack Vector

An authenticated attacker with any low-privileged account can send crafted HTTP requests directly to the Hyperion Financial Reporting server. The network attack vector combined with low attack complexity means exploitation does not require specialized conditions or timing. Once exploited, the attacker achieves takeover of the application, gaining high impact across confidentiality, integrity, and availability.

No public proof-of-concept exploit is currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to the Oracle Security Alert for further technical context.

Detection Methods for CVE-2026-70787

Indicators of Compromise

Unexpected HTTP requests to Hyperion Financial Reporting endpoints originating from low-privileged user sessions
New or modified financial report definitions, schedules, or export jobs that do not map to authorized change requests
Anomalous authentication events for Hyperion service accounts followed by administrative actions
Outbound connections from the Hyperion server to untrusted external hosts

Detection Strategies

Baseline normal HTTP traffic patterns to the Hyperion Financial Reporting server and alert on deviations
Correlate authentication events with sensitive administrative operations inside the Hyperion application
Inspect web server and application logs for repeated 4xx or 5xx responses that precede successful takeover activity

Monitoring Recommendations

Forward Hyperion application, WebLogic, and reverse proxy logs to a centralized SIEM for continuous analysis
Monitor the underlying server for new processes, scheduled tasks, or child processes spawned by the Hyperion service account
Track file integrity on report templates, configuration files, and web application directories

How to Mitigate CVE-2026-70787

Immediate Actions Required

Apply the patches referenced in the Oracle Security Alert for the August 2026 Critical Patch Update
Inventory all Oracle Hyperion Financial Reporting deployments and identify instances running version 11.2.25.0.000
Restrict network access to the Hyperion Server so only authorized users and management hosts can reach HTTP endpoints
Review recent authentication logs for low-privileged accounts that accessed the server and revoke any suspicious credentials

Patch Information

Oracle addresses this vulnerability in the August 2026 Critical Patch Update. Administrators should follow Oracle's patch application guidance for Hyperion Financial Reporting 11.2.25.0.000 as documented in the Oracle Security Alert. Validate patch success by confirming the reported product build after deployment.

Workarounds

Enforce network segmentation and firewall rules that limit HTTP access to Hyperion Financial Reporting to trusted networks
Require multi-factor authentication for all Hyperion accounts to raise the barrier for the low-privilege prerequisite
Audit and reduce the number of accounts with any level of Hyperion access, following least-privilege principles
Place the application behind a web application firewall (WAF) to filter anomalous HTTP requests until patching is complete

bash

# Configuration example: restrict inbound HTTP access to Hyperion Server via iptables
iptables -A INPUT -p tcp --dport 19000 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 19000 -j DROP