CVE-2026-70759: Oracle Hyperion Auth Bypass Vulnerability

CVE-2026-70759 Overview

CVE-2026-70759 is a vulnerability in the Oracle Hyperion Financial Reporting product of Oracle Hyperion, affecting the Server component. The affected supported version is 11.2.25.0.000. An unauthenticated attacker with network access over HTTP can exploit the flaw, but successful attacks require user interaction from a person other than the attacker. Exploitation can result in unauthorized update, insert, or delete access to a subset of Oracle Hyperion Financial Reporting data, and unauthorized read access to a subset of that data.

Critical Impact
Successful exploitation grants an unauthenticated remote attacker limited read and write access to Oracle Hyperion Financial Reporting data when a legitimate user interacts with attacker-controlled content.

Affected Products

Oracle Hyperion Financial Reporting
Oracle Hyperion Financial Reporting Server component
Oracle Hyperion Financial Reporting version 11.2.25.0.000

Discovery Timeline

2026-08-18 - CVE CVE-2026-70759 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-70759

Vulnerability Analysis

The vulnerability resides in the Server component of Oracle Hyperion Financial Reporting version 11.2.25.0.000. Oracle classifies the flaw as easily exploitable over HTTP with no authentication required, but it depends on interaction from a user other than the attacker. This user-interaction requirement is characteristic of client-side attack patterns such as reflected cross-site scripting, cross-site request forgery, or crafted-link handling within the reporting server's web interface.

Oracle's advisory scopes the impact to a subset of accessible data, indicating partial confidentiality and integrity effects rather than full-system compromise. Availability of the reporting service is not impacted. Because Hyperion Financial Reporting handles financial statements and consolidations, unauthorized modification of even a subset of records can affect the integrity of downstream financial workflows.

Root Cause

Oracle has not published root-cause details in the public advisory. The combination of network attack vector, absent privileges, and required user interaction is consistent with an input-handling weakness in a server-side web component that renders attacker-supplied content back to an authenticated user. Refer to the Oracle Security Alert for authoritative details.

Attack Vector

An attacker delivers a crafted HTTP request or URL targeting the Hyperion Financial Reporting Server. A separate authenticated or unauthenticated user must interact with the attacker-supplied content, for example by clicking a link or loading a page. When triggered, the server processes the request in the context of that user, enabling limited read and write operations against Hyperion Financial Reporting data. No credentials are required from the attacker to stage the request.

No verified proof-of-concept code is publicly available. See the Oracle Security Alert for vendor guidance.

Detection Methods for CVE-2026-70759

Indicators of Compromise

Unexpected HTTP requests to Hyperion Financial Reporting Server endpoints originating from external referrers or unusual user agents.
Unauthorized modifications, insertions, or deletions in Hyperion Financial Reporting datasets not tied to a documented user action.
Web access logs showing crafted query strings or payloads targeting reporting server URLs.

Detection Strategies

Baseline normal HTTP traffic to the Hyperion Financial Reporting Server and alert on parameter values or request patterns that deviate from expected reporting workflows.
Correlate application-level audit trails with web server access logs to identify data changes that lack a corresponding legitimate user session.
Deploy web application firewall rules to inspect requests to Hyperion endpoints for suspicious payloads consistent with injection or forged-request patterns.

Monitoring Recommendations

Enable verbose HTTP access and application audit logging on the Hyperion Financial Reporting Server and forward events to a central analytics platform.
Monitor for spikes in failed authorization events or record-level changes performed outside business hours.
Track outbound links and email content delivered to Hyperion users to identify social-engineering campaigns that could satisfy the user-interaction requirement.

How to Mitigate CVE-2026-70759

Immediate Actions Required

Apply the fixes referenced in the Oracle Security Alert for Hyperion Financial Reporting 11.2.25.0.000.
Restrict network exposure of the Hyperion Financial Reporting Server so it is not reachable directly from untrusted networks.
Brief Hyperion users on the user-interaction requirement and reinforce caution when following links that reference reporting URLs.

Patch Information

Oracle has addressed the issue as part of its August 2026 security alert cycle. Refer to the Oracle Security Alert for the specific patch bundle applicable to Oracle Hyperion Financial Reporting 11.2.25.0.000. Apply the Oracle-provided patch through standard Hyperion patch management procedures, and validate reporting functionality after deployment.

Workarounds

Place the Hyperion Financial Reporting Server behind a reverse proxy or web application firewall that enforces strict request validation.
Limit HTTP access to Hyperion Financial Reporting endpoints to trusted internal network segments and known client IP ranges.
Enforce short session timeouts and require re-authentication for sensitive reporting operations to reduce the window of exploitation.

bash

# Configuration example
# Example: restrict Hyperion Financial Reporting Server exposure at the network edge
# Replace <trusted-subnet> and <hyperion-server-ip> with environment-specific values
iptables -A INPUT -p tcp --dport 8200 -s <trusted-subnet> -d <hyperion-server-ip> -j ACCEPT
iptables -A INPUT -p tcp --dport 8200 -d <hyperion-server-ip> -j DROP