CVE-2026-70739: Oracle Hyperion Financial Reporting RCE

CVE-2026-70739 Overview

CVE-2026-70739 is a critical vulnerability in the Oracle Hyperion Financial Reporting product, part of the Oracle Hyperion suite. The flaw resides in the Server component and affects version 11.2.25.0.000. An unauthenticated remote attacker with network access via HTTP can exploit this issue to fully compromise the affected system.

Successful exploitation results in complete takeover of Oracle Hyperion Financial Reporting, impacting confidentiality, integrity, and availability. Oracle disclosed the issue in the Oracle Security Alert Advisory.

Critical Impact
Unauthenticated network attackers can achieve full takeover of Oracle Hyperion Financial Reporting servers with no user interaction required.

Affected Products

Oracle Hyperion Financial Reporting 11.2.25.0.000
Oracle Hyperion (Server component)
Deployments exposing the Hyperion Financial Reporting HTTP interface to network access

Discovery Timeline

2026-08-18 - CVE-2026-70739 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-70739

Vulnerability Analysis

CVE-2026-70739 affects the Server component of Oracle Hyperion Financial Reporting. The vulnerability is exploitable over the network via HTTP, requires no privileges, and does not require user interaction. This combination allows opportunistic mass exploitation once technical details or a proof of concept becomes public.

Oracle classifies the outcome as full takeover of the Hyperion Financial Reporting service. Attackers gaining control can read or modify financial data, deploy persistence mechanisms, and pivot to connected Oracle Hyperion infrastructure. Financial reporting servers frequently hold sensitive earnings data, consolidation logic, and integrations with ERP databases, which elevates the business risk of compromise.

The EPSS probability is currently 0.486%, but this value can rise sharply after exploit code is published. Defenders should not delay patching based on the current EPSS value.

Root Cause

Oracle has not published root cause specifics beyond identifying the Server component of Oracle Hyperion Financial Reporting version 11.2.25.0.000. The reported outcome — unauthenticated HTTP-based full compromise — is consistent with server-side flaws such as unsafe deserialization, authentication bypass, or command injection in a Java-based web tier. Refer to the Oracle Security Alert Advisory for authoritative details.

Attack Vector

The attack vector is network-based over HTTP. An attacker sends a crafted HTTP request to the Hyperion Financial Reporting server without needing credentials or user interaction. The attacker gains the ability to execute privileged actions inside the application server. Internet-exposed instances are at highest risk, and internal deployments remain reachable to any authenticated network user or lateral-movement actor.

No verified public proof of concept is available at the time of publication. See the Oracle Security Alert Advisory for exploitation prerequisites.

Detection Methods for CVE-2026-70739

Indicators of Compromise

Unexpected HTTP POST requests to Hyperion Financial Reporting endpoints from unknown external IP addresses
New administrative accounts, scheduled tasks, or services created on the Hyperion server without change management approval
Outbound network connections initiated by the Hyperion service account to untrusted destinations
Modification of report templates, workspace files, or database configuration files outside normal maintenance windows

Detection Strategies

Enable verbose access and error logging on the Hyperion Financial Reporting web tier and forward logs to a centralized SIEM
Baseline normal HTTP request patterns to the Hyperion server and alert on anomalous URIs, methods, or user agents
Monitor the Hyperion service account for process spawning of shells, scripting engines, or system utilities
Alert on any unauthenticated request that results in server-side write actions or configuration changes

Monitoring Recommendations

Deploy web application firewall rules in front of the Hyperion HTTP listener to log and inspect all inbound traffic
Correlate authentication logs, process telemetry, and network flows for the Hyperion host to identify multi-stage intrusions
Track file integrity on Hyperion binaries, deployment directories, and configuration files

How to Mitigate CVE-2026-70739

Immediate Actions Required

Apply the Oracle security patch referenced in the Oracle Security Alert Advisory as the primary remediation
Inventory all Oracle Hyperion Financial Reporting deployments and confirm which run version 11.2.25.0.000
Restrict network access to the Hyperion Financial Reporting HTTP interface to trusted management networks only
Rotate credentials, API keys, and integration secrets stored on or accessible from affected servers

Patch Information

Oracle addressed CVE-2026-70739 in the August 2026 security alert cycle. Administrators should review the Oracle Security Alert Advisory and apply the fix for Oracle Hyperion Financial Reporting 11.2.25.0.000. Schedule the update during the next available maintenance window and validate reporting functionality post-patch.

Workarounds

Block external access to the Hyperion Financial Reporting HTTP and HTTPS ports at perimeter firewalls until patching is complete
Place the Hyperion server behind a reverse proxy or WAF configured to filter unauthenticated write requests
Require VPN or zero-trust network access for all Hyperion administrative and reporting sessions
Disable or isolate unused Hyperion components and integrations to reduce exposure surface

bash

# Example: temporarily restrict Hyperion Financial Reporting access with iptables
# Replace 10.0.0.0/24 with your trusted admin subnet
iptables -A INPUT -p tcp --dport 8200 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8200 -j DROP
iptables -A INPUT -p tcp --dport 19000 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 19000 -j DROP