CVE-2026-70938 Overview
CVE-2026-70938 is an improper access control vulnerability [CWE-284] in the Security component of Oracle Hyperion Financial Management. The affected supported version is 11.2.25.0.000. A low-privileged attacker with network access via HTTP can exploit this weakness to read data managed by the application. Oracle disclosed the issue in its August 2026 Critical Patch Update advisory. The vulnerability affects confidentiality only; integrity and availability are not impacted.
Critical Impact
Successful exploitation can grant an authenticated attacker unauthorized access to critical financial data or complete access to all data accessible through Oracle Hyperion Financial Management.
Affected Products
- Oracle Hyperion Financial Management 11.2.25.0.000
- Oracle Hyperion product family (Security component)
- Deployments exposing the Hyperion Financial Management HTTP interface to authenticated users
Discovery Timeline
- 2026-08-18 - CVE-2026-70938 published to NVD
- 2026-08-22 - Last updated in NVD database
Technical Details for CVE-2026-70938
Vulnerability Analysis
The flaw resides in the Security component of Oracle Hyperion Financial Management (HFM). HFM is an enterprise consolidation, reporting, and analysis platform used for financial close and regulatory reporting. The vulnerability allows a low-privileged authenticated user to bypass access restrictions and retrieve data that should be limited to higher-privileged roles. Because HFM stores sensitive financial records, exposure can include ledger data, entity structures, and consolidation results.
Root Cause
The issue is classified as improper access control [CWE-284]. Authorization checks within the Security component fail to correctly enforce entitlement boundaries between low-privileged users and protected data objects. As a result, requests submitted by an authenticated user are processed without validating whether the requester holds the required role for the target resource.
Attack Vector
Exploitation requires network access via HTTP and valid credentials for any low-privileged account within the target HFM deployment. No user interaction is required and no elevated privileges are needed beyond initial authentication. An attacker crafts requests against the HFM web interface or its API surface to reach data that the Security component fails to gate correctly. The scope is unchanged and only confidentiality is affected.
No verified public proof-of-concept exploit code is available at the time of publication. Refer to the Oracle Security Alert: August 2026 for vendor technical details.
Detection Methods for CVE-2026-70938
Indicators of Compromise
- Unexpected HTTP requests from low-privileged HFM accounts targeting administrative or cross-entity data endpoints.
- Application or audit logs showing successful reads of financial data by users whose roles should not authorize such access.
- Session activity from service or shared accounts querying broad ranges of entities within short time windows.
Detection Strategies
- Enable HFM native audit logging for data access and user activity, then baseline normal read volumes per role.
- Alert on authenticated users accessing entities, scenarios, or years outside their assigned security class.
- Correlate HFM authentication events with downstream data extract requests to detect enumeration patterns.
Monitoring Recommendations
- Forward HFM application logs and web server access logs to a centralized SIEM for retention and correlation.
- Track anomalous growth in data export volume or API call rates from individual accounts.
- Review privileged and low-privileged account entitlements quarterly to detect unauthorized role drift.
How to Mitigate CVE-2026-70938
Immediate Actions Required
- Apply the fixes from the Oracle Critical Patch Update dated August 2026 to all Hyperion Financial Management instances running 11.2.25.0.000.
- Inventory all HFM deployments and confirm patch level using Oracle's opatch tooling.
- Restrict HTTP access to the HFM interface to trusted network segments and VPN users until patching completes.
- Rotate credentials for any accounts suspected of misuse and review recent access logs for anomalous reads.
Patch Information
Oracle addressed CVE-2026-70938 in the August 2026 Critical Patch Update. Administrators should review the Oracle Security Alert: August 2026 for patch identifiers, prerequisites, and installation guidance specific to Hyperion Financial Management 11.2.25.0.000.
Workarounds
- Reduce the number of low-privileged accounts with network reachability to the HFM application tier.
- Enforce multi-factor authentication at the reverse proxy or identity provider fronting HFM to limit credential-based access.
- Place HFM behind a web application firewall with rules restricting access to sensitive endpoints by source and role.
- Disable or remove dormant HFM accounts to shrink the pool of credentials that could be abused for exploitation.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
