CVE-2026-70746: Oracle Hyperion Auth Bypass Vulnerability

CVE-2026-70746 Overview

CVE-2026-70746 affects the Oracle Hyperion Financial Reporting product within Oracle Hyperion, specifically the Server component. The supported version affected is 11.2.25.0.000. An unauthenticated attacker with network access via HTTP can compromise Oracle Hyperion Financial Reporting. Successful exploitation requires user interaction from a person other than the attacker.

Successful attacks can result in unauthorized creation, deletion, or modification of critical data, and unauthorized read access to all Oracle Hyperion Financial Reporting accessible data. Oracle addressed the flaw in its August 2026 Critical Patch Update.

Critical Impact
An unauthenticated network attacker who tricks a user into interacting with a malicious request can read, modify, or delete all data accessible to Oracle Hyperion Financial Reporting.

Affected Products

Oracle Hyperion Financial Reporting 11.2.25.0.000
Oracle Hyperion (Server component)
Deployments exposing the Hyperion Financial Reporting server over HTTP

Discovery Timeline

2026-08-18 - CVE-2026-70746 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-70746

Vulnerability Analysis

The flaw resides in the Server component of Oracle Hyperion Financial Reporting. An attacker reaches the vulnerable code path over the network via HTTP without authentication. Exploitation requires a legitimate user to interact with attacker-supplied content, such as clicking a crafted link or loading a malicious page while authenticated to Hyperion.

Once triggered, the attacker gains the ability to read, create, modify, or delete data available to Hyperion Financial Reporting. Confidentiality and integrity impacts are high, while availability is not affected. The user-interaction requirement suggests a client-mediated attack pattern such as cross-site request forgery or a similar browser-driven request forgery against an authenticated session.

Root Cause

Oracle has not published a detailed root cause. The description indicates that the Server component processes attacker-influenced HTTP requests without sufficient authentication or origin validation when a victim user is coerced into initiating the interaction. This pattern typically maps to missing anti-CSRF controls, insufficient session validation, or improper request authorization on privileged Hyperion endpoints.

Attack Vector

The attack vector is network-based over HTTP. The attacker crafts a malicious HTTP request or web page targeting a Hyperion Financial Reporting server endpoint. When an authenticated Hyperion user interacts with the attacker's content, the request executes in the user's security context. The vulnerability does not require attacker credentials, and attack complexity is low.

No public proof-of-concept is available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to the Oracle Security Alert for vendor-supplied technical details.

Detection Methods for CVE-2026-70746

Indicators of Compromise

HTTP requests to Hyperion Financial Reporting Server endpoints originating from unexpected Referer or Origin headers.
Unexplained creation, modification, or deletion of Hyperion reports, folders, or user permissions correlated with active user sessions.
Authenticated Hyperion sessions issuing sensitive state-changing requests immediately after visiting external URLs.

Detection Strategies

Enable verbose HTTP access logging on the Hyperion Financial Reporting Server and inspect requests that alter reporting objects.
Correlate web proxy logs with Hyperion audit logs to identify user sessions redirected through untrusted external sites before privileged Hyperion actions.
Alert on Hyperion administrative API calls that lack expected same-origin headers or CSRF tokens.

Monitoring Recommendations

Monitor Hyperion audit trails for bulk read, export, or deletion events outside business hours.
Track outbound browser navigation from finance and reporting workstations to newly registered or low-reputation domains.
Baseline typical Hyperion request patterns per user and alert on statistical deviations in report access volume.

How to Mitigate CVE-2026-70746

Immediate Actions Required

Apply the fixes from the Oracle Critical Patch Update Advisory - August 2026 to Oracle Hyperion Financial Reporting 11.2.25.0.000.
Restrict network access to Hyperion Financial Reporting Server so that only trusted corporate networks and VPN users can reach it.
Require Hyperion users to log out of active sessions before browsing untrusted web content, and enforce short session timeouts.

Patch Information

Oracle released the fix as part of the August 2026 Critical Patch Update. Administrators should download and apply the patch referenced in the Oracle Security Alert for Oracle Hyperion Financial Reporting 11.2.25.0.000. Confirm the patch level after deployment and validate reporting functionality in a staging environment before production rollout.

Workarounds

Place the Hyperion Financial Reporting Server behind a reverse proxy or web application firewall that enforces strict Origin and Referer header validation on state-changing requests.
Segment finance user workstations from general internet browsing, or use browser isolation for users with Hyperion access.
Disable or restrict access to non-essential Hyperion Financial Reporting endpoints until the patch is applied.

bash

# Configuration example: WAF rule concept to block cross-origin state-changing requests
# Reject POST/PUT/DELETE to Hyperion Financial Reporting when Origin is not the trusted host
SecRule REQUEST_METHOD "@rx ^(POST|PUT|DELETE)$" \
  "chain,deny,status:403,id:1026070746,msg:'CVE-2026-70746 cross-origin block'"
  SecRule REQUEST_HEADERS:Origin "!@rx ^https://hyperion\.example\.corp$"