CVE-2026-70818: Oracle Hyperion Auth Bypass Vulnerability

CVE-2026-70818 Overview

CVE-2026-70818 affects the Oracle Hyperion Financial Management product within the Oracle Hyperion suite, specifically the Security component. The affected supported version is 11.2.25.0.000. The flaw allows a low-privileged attacker with network access via SQL to compromise Oracle Hyperion Financial Management. Successful exploitation can result in full takeover of the application, impacting confidentiality, integrity, and availability.

Critical Impact
A low-privileged, network-based attacker can take over Oracle Hyperion Financial Management by exploiting the Security component via SQL.

Affected Products

Oracle Hyperion Financial Management 11.2.25.0.000
Oracle Hyperion (Security component)
Deployments exposing the Hyperion Financial Management interface over the network

Discovery Timeline

2026-08-18 - CVE-2026-70818 published to the National Vulnerability Database (NVD)
2026-08-20 - Last updated in NVD database
2026-08-20 - EPSS score recorded at 0.447% (percentile 37.39)

Technical Details for CVE-2026-70818

Vulnerability Analysis

The vulnerability resides in the Security component of Oracle Hyperion Financial Management. Oracle characterizes it as easily exploitable, requiring only network access and low privileges. No user interaction is required, and the attack does not need to cross a security scope boundary. Successful exploitation results in high impact to confidentiality, integrity, and availability, meaning an attacker can read, modify, and disrupt financial data managed by the platform.

Oracle Hyperion Financial Management is used for enterprise financial consolidation, close, and reporting. A takeover of this application exposes sensitive financial records, allows manipulation of consolidated financial statements, and can disrupt reporting cycles that regulated entities depend on.

Root Cause

Oracle's advisory identifies the Security component as the vulnerable subsystem and indicates SQL is the exploitation channel. Oracle did not publish a CWE mapping or detailed root cause description in the referenced alert. Based on the vector and vendor description, the flaw allows an authenticated user to leverage SQL-level access to escalate control over the application. Refer to the Oracle Security Alert for authoritative details.

Attack Vector

An attacker must have network reachability to the Hyperion Financial Management service and a low-privileged account. From there, the attacker issues SQL-based requests against the Security component to gain control of the application. Because attack complexity is low and user interaction is not required, exploitation can be automated once credentials are obtained through phishing, credential stuffing, or insider access.

No public proof-of-concept exploit is available at the time of publication. See the Oracle Security Alert for vendor guidance.

Detection Methods for CVE-2026-70818

Indicators of Compromise

Unexpected SQL statements issued by low-privileged Hyperion accounts against Security component tables or stored procedures
New or modified Hyperion administrator accounts or role assignments not tied to a change ticket
Anomalous outbound connections or data exports from the Hyperion Financial Management application server
Authentication events from low-privileged users followed by privilege changes or configuration modifications

Detection Strategies

Enable database-level auditing on the Hyperion repository schema and alert on DDL or privilege changes originating from application accounts
Baseline normal SQL patterns from the Hyperion application tier and flag deviations, including unusual query volume, syntax, or targeted tables
Correlate Hyperion application logs with database audit logs to reconstruct request-to-query paths for suspicious sessions

Monitoring Recommendations

Forward Hyperion application, web tier, and database audit logs to a centralized SIEM for correlation and long-term retention
Monitor authentication logs for low-privileged accounts performing security or configuration operations
Track file integrity on Hyperion configuration files and scheduled tasks on the application server

How to Mitigate CVE-2026-70818

Immediate Actions Required

Apply the Oracle Critical Patch Update referenced in the Oracle Security Alert to all Hyperion Financial Management 11.2.25.0.000 deployments
Restrict network access to the Hyperion Financial Management application to trusted management networks and jump hosts
Review and reduce standing privileges on Hyperion user accounts, removing dormant or unnecessary access
Rotate credentials for Hyperion service accounts and database connections after patching

Patch Information

Oracle addressed CVE-2026-70818 in its August 2026 Critical Patch Update. Administrators should consult the Oracle Security Alert for the specific patch identifiers, download locations, and prerequisite steps for Hyperion Financial Management 11.2.25.0.000. Apply the patch in a staged environment before production rollout to validate compatibility with existing financial workflows.

Workarounds

Place Hyperion Financial Management behind a VPN or zero-trust network access gateway to remove direct network exposure
Enforce multi-factor authentication on all Hyperion user accounts to raise the cost of credential-based access
Apply database-tier least privilege so application accounts cannot alter security-relevant objects outside expected operations
Increase logging verbosity on the Security component and forward events to a monitored SIEM until patching is complete

bash

# Example: restrict Hyperion Financial Management network exposure with host firewall rules
# Replace <mgmt_subnet> with your authorized administration network
iptables -A INPUT -p tcp --dport 443 -s <mgmt_subnet> -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP