CVE-2026-70682 Overview
CVE-2026-70682 affects the Oracle Hyperion Calculation Manager product within the Oracle Hyperion suite. The vulnerability resides in the Security component of version 11.2.25.0.000. An unauthenticated attacker with network access via HTTP can exploit this weakness, though successful exploitation is difficult and requires specific conditions.
Successful attacks grant unauthorized read access to a subset of data accessible through Oracle Hyperion Calculation Manager. The vulnerability impacts confidentiality only, with no integrity or availability consequences. Oracle disclosed the issue in its August 2026 Critical Patch Update advisory.
Critical Impact
An unauthenticated remote attacker can obtain partial read access to Oracle Hyperion Calculation Manager data over HTTP without user interaction.
Affected Products
- Oracle Hyperion Calculation Manager 11.2.25.0.000
- Oracle Hyperion (Security component)
- Deployments exposing Hyperion Calculation Manager over HTTP
Discovery Timeline
- 2026-08-18 - CVE-2026-70682 published to the National Vulnerability Database
- 2026-08-20 - Last updated in NVD database
Technical Details for CVE-2026-70682
Vulnerability Analysis
The flaw exists in the Security component of Oracle Hyperion Calculation Manager. An attacker can reach the vulnerable code path over the network using HTTP without authenticating. The attack does not require user interaction and does not cross a privilege or trust boundary once triggered.
Exploitation is classified as difficult, meaning the attacker must satisfy conditions outside their direct control such as timing, environment state, or configuration variables. When conditions align, the attacker gains read access to a subset of application data. Integrity and availability are not affected by this issue. The Exploit Prediction Scoring System places this vulnerability in the lower risk tier for near-term exploitation activity.
Root Cause
Oracle attributes the weakness to the Security component of Hyperion Calculation Manager. Oracle has not published a public technical breakdown of the root cause. The advisory indicates the defect allows access-control checks or data-boundary enforcement to be bypassed under specific conditions, resulting in information disclosure. No CWE identifier has been assigned in the NVD record.
Attack Vector
The attack path uses HTTP against exposed Hyperion Calculation Manager instances. No credentials, prior access, or victim interaction is required. Because the vulnerability is difficult to exploit, attackers typically need to reconnoiter the target instance and match environmental preconditions before a request succeeds. Refer to the Oracle Security Alert for vendor-specific technical guidance.
No public proof-of-concept exploit code has been observed for this vulnerability at the time of publication.
Detection Methods for CVE-2026-70682
Indicators of Compromise
- Unauthenticated HTTP requests to Hyperion Calculation Manager endpoints originating from unexpected IP ranges
- Repeated probing of Calculation Manager URIs consistent with reconnaissance for the Security component
- Anomalous response sizes or HTTP 200 responses returned to unauthenticated sessions accessing protected resources
Detection Strategies
- Monitor Hyperion Calculation Manager web access logs for unauthenticated requests that receive non-error responses
- Correlate HTTP traffic patterns against baseline authenticated user behavior to surface anomalous read activity
- Alert on network sessions to Hyperion services from sources outside sanctioned administrative zones
Monitoring Recommendations
- Forward Hyperion application and web server logs to a centralized analytics platform for retention and correlation
- Track outbound data volumes from Hyperion hosts to identify sustained information disclosure attempts
- Review access to Calculation Manager APIs on a scheduled cadence and validate that authentication controls are enforced
How to Mitigate CVE-2026-70682
Immediate Actions Required
- Apply the fixes documented in the Oracle August 2026 Critical Patch Update for Hyperion Calculation Manager
- Inventory all Oracle Hyperion deployments and confirm which instances run version 11.2.25.0.000
- Restrict network reachability of Hyperion Calculation Manager to trusted administrative segments only
Patch Information
Oracle published fixes as part of the August 2026 Critical Patch Update. Administrators should reference the Oracle Security Alert for the applicable patch bundle and installation instructions. Apply the update to any Hyperion Calculation Manager instance running the affected 11.2.25.0.000 build.
Workarounds
- Place Hyperion Calculation Manager behind a reverse proxy or web application firewall that enforces authentication before request forwarding
- Block external HTTP access to Hyperion endpoints at the network perimeter until patching is complete
- Enforce network segmentation so only approved finance and administrative subnets can reach the application
# Example: restrict Hyperion Calculation Manager access to trusted subnet only
iptables -A INPUT -p tcp --dport 8500 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8500 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
