CVE-2026-70956: Oracle Hyperion Authentication Bypass Vulnerability

CVE-2026-70956 Overview

CVE-2026-70956 affects the Oracle Hyperion Infrastructure Technology product within the Oracle Hyperion suite, specifically the Installation and Configuration component. The vulnerability exists in version 11.2.25.0.000 and stems from missing authentication for a critical function [CWE-306]. A low-privileged attacker with network access via HTTP can exploit this flaw to compromise the affected system. Successful exploitation results in complete takeover of Oracle Hyperion Infrastructure Technology, impacting confidentiality, integrity, and availability. Oracle disclosed the issue in the August 2026 Critical Patch Update Security Alert.

Critical Impact
Successful exploitation allows a low-privileged network attacker to fully take over Oracle Hyperion Infrastructure Technology, compromising confidentiality, integrity, and availability.

Affected Products

Oracle Hyperion Infrastructure Technology 11.2.25.0.000
Component: Installation and Configuration
Oracle Hyperion product suite

Discovery Timeline

2026-08-18 - CVE-2026-70956 published to NVD
2026-08-22 - Last updated in NVD database

Technical Details for CVE-2026-70956

Vulnerability Analysis

The vulnerability resides in the Installation and Configuration component of Oracle Hyperion Infrastructure Technology. It is categorized under [CWE-306], Missing Authentication for Critical Function, meaning a sensitive operation is exposed without adequate authentication controls. An attacker requires only low privileges and network access via HTTP to trigger the flaw. Exploitation does not depend on user interaction, and the attack complexity is low. Because the compromise leads to full product takeover, an attacker can read, modify, and destroy data within the affected Hyperion environment.

Root Cause

The root cause is the absence of proper authentication enforcement on a critical function exposed by the Installation and Configuration component. Oracle has not published detailed internal specifics, but the CWE classification indicates that a security-relevant endpoint or operation can be reached and invoked by an authenticated user whose privilege level does not meet the requirement for that action.

Attack Vector

The attack vector is network-based over HTTP. An attacker holding any low-privileged account within the Hyperion environment can send crafted HTTP requests to the vulnerable component. No user interaction is required, and the scope remains unchanged, meaning the impact is contained within the vulnerable component but results in full compromise of that component. See the Oracle Security Alert for vendor guidance.

// No verified public exploit code is available for CVE-2026-70956.
// Refer to the Oracle August 2026 Security Alert for technical remediation details.

Detection Methods for CVE-2026-70956

Indicators of Compromise

Unexpected HTTP requests to Oracle Hyperion Infrastructure Technology installation and configuration endpoints from low-privileged accounts.
Anomalous administrative changes to Hyperion configuration files or service parameters.
Creation of new administrative users or unexpected privilege changes within Hyperion.

Detection Strategies

Monitor HTTP access logs on Hyperion application servers for requests targeting installation and configuration URLs by non-administrative users.
Baseline normal configuration change activity and alert on deviations, particularly outside of maintenance windows.
Correlate authentication events with configuration modification events to identify low-privileged accounts performing high-impact actions.

Monitoring Recommendations

Enable verbose audit logging on Oracle Hyperion Infrastructure Technology and forward logs to a central SIEM.
Alert on any HTTP 200 responses from installation/configuration endpoints originating from unexpected source IPs or accounts.
Track process creation and file integrity on the Hyperion server host to detect post-exploitation activity.

How to Mitigate CVE-2026-70956

Immediate Actions Required

Apply the fixes released in the Oracle August 2026 Critical Patch Update Security Alert without delay.
Restrict network access to Oracle Hyperion Infrastructure Technology HTTP endpoints to trusted management networks only.
Review and reduce the number of low-privileged accounts with any level of access to the Hyperion environment.
Audit recent HTTP access logs and configuration changes for signs of prior exploitation.

Patch Information

Oracle addressed CVE-2026-70956 in the August 2026 Critical Patch Update Security Alert. Administrators should consult the Oracle Security Alert for the applicable patch and installation procedure for Oracle Hyperion Infrastructure Technology 11.2.25.0.000.

Workarounds

Place Oracle Hyperion Infrastructure Technology behind a reverse proxy or web application firewall that enforces authentication on installation and configuration paths.
Disable or block network access to installation and configuration endpoints when they are not actively required.
Enforce strict network segmentation so that only administrative jump hosts can reach the Hyperion management interface.

bash

# Example: restrict access to Hyperion HTTP endpoints using 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