CVE-2026-70934: Oracle Hyperion Auth Bypass Vulnerability

CVE-2026-70934 Overview

CVE-2026-70934 affects the Security component of Oracle Hyperion Financial Management version 11.2.25.0.000. The flaw permits a low-privileged attacker with network access over HTTP to compromise the application. Successful exploitation exposes critical data and can cause a partial denial of service. Oracle disclosed the issue in the August 2026 Critical Patch Update. The weakness maps to [CWE-284: Improper Access Control].

Critical Impact
Authenticated network attackers can obtain unauthorized access to all Oracle Hyperion Financial Management data and degrade service availability.

Affected Products

Oracle Hyperion Financial Management 11.2.25.0.000
Component: Security
Product family: Oracle Hyperion

Discovery Timeline

2026-08-18 - CVE-2026-70934 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-70934

Vulnerability Analysis

The vulnerability resides in the Security component of Oracle Hyperion Financial Management. An authenticated attacker with low privileges can send HTTP requests that bypass intended access restrictions. The flaw grants unauthorized read access to data managed by the application and enables partial disruption of service. Confidentiality impact is rated high, while availability impact is limited. Integrity is not affected, meaning the attacker cannot modify records through this specific weakness.

Because Hyperion Financial Management processes consolidated financial reporting data for enterprises, exposure typically includes financial statements, intercompany balances, and reporting metadata subject to regulatory controls such as SOX.

Root Cause

The issue stems from improper access control [CWE-284] within the Security component. Authorization logic fails to correctly validate the privileges of an authenticated user against the resources being requested. Any account with valid low-privilege credentials, such as a standard reporting user, can therefore reach data or functions intended for higher-privileged roles.

Attack Vector

Exploitation requires only network reachability to the Hyperion HTTP interface and valid low-privilege credentials. No user interaction is needed, attack complexity is low, and the scope remains unchanged. Attackers with harvested credentials, insider access, or access to a compromised low-tier account can therefore chain this vulnerability into broader financial data theft.

No public proof-of-concept exploit is available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The EPSS forecast places exploitation probability at 0.348%.

Technical details are limited to those published in the Oracle Security Alert.

Detection Methods for CVE-2026-70934

Indicators of Compromise

Authenticated HTTP requests from low-privileged Hyperion accounts targeting administrative or restricted endpoints within the Security component.
Unexpected data export or reporting activity originating from accounts that historically perform limited operations.
Session anomalies such as access to consolidation modules or metadata that fall outside a user's assigned role.

Detection Strategies

Enable and review Hyperion Financial Management audit logs for access attempts that succeed against resources beyond the calling user's role assignments.
Correlate web server and application logs to identify low-privileged sessions requesting URLs associated with privileged operations.
Baseline normal per-role activity and alert on deviations, particularly bulk data reads or repeated authorization checks in short intervals.

Monitoring Recommendations

Forward Hyperion application, IIS, and database audit logs to a centralized SIEM for retention and correlation.
Alert on repeated HTTP 200 responses to endpoints that should return HTTP 401 or 403 for the calling role.
Monitor Active Directory and Hyperion Shared Services for unusual authentication patterns against Hyperion service accounts.

How to Mitigate CVE-2026-70934

Immediate Actions Required

Apply the Oracle August 2026 Critical Patch Update to Oracle Hyperion Financial Management 11.2.25.0.000 on all environments, starting with production.
Inventory low-privilege Hyperion accounts and revoke any that are dormant, shared, or no longer required.
Rotate credentials for service accounts and any accounts suspected of exposure prior to patching.

Patch Information

Oracle released the fix as part of the August 2026 Critical Patch Update. Administrators should download the corresponding patch bundle from My Oracle Support and follow the vendor's staged rollout guidance. Refer to the Oracle Security Alert for patch identifiers, prerequisites, and validation steps.

Workarounds

Restrict network access to the Hyperion Financial Management HTTP interface using firewall rules or reverse-proxy allow-lists limited to trusted subnets.
Enforce multi-factor authentication on all Hyperion accounts to reduce the risk of credential-based abuse until patching completes.
Review and tighten role assignments in Hyperion Shared Services so that low-privileged users cannot reach sensitive consolidation data.

bash

# Example: restrict Hyperion HTTP access at the host firewall (Windows)
netsh advfirewall firewall add rule ^
  name="Hyperion HFM - Restrict Access" ^
  dir=in action=allow protocol=TCP localport=19000 ^
  remoteip=10.10.20.0/24

netsh advfirewall firewall add rule ^
  name="Hyperion HFM - Block Others" ^
  dir=in action=block protocol=TCP localport=19000