CVE-2026-61342: Oracle Hyperion Auth Bypass Vulnerability

CVE-2026-61342 Overview

CVE-2026-61342 affects the Oracle Hyperion Calculation Manager product within the Oracle Hyperion suite, specifically the Security component. The supported version affected is 11.2.25.0.000. An unauthenticated attacker with network access via HTTP can exploit this flaw, though successful exploitation requires user interaction from a person other than the attacker and involves high attack complexity. Successful attacks can result in unauthorized access to critical data or complete access to all data accessible through Oracle Hyperion Calculation Manager.

Critical Impact
Successful exploitation exposes confidential data within Oracle Hyperion Calculation Manager to unauthenticated network attackers under specific conditions requiring user interaction.

Affected Products

Oracle Hyperion Calculation Manager 11.2.25.0.000
Oracle Hyperion (Security component)
Deployments exposing Oracle Hyperion Calculation Manager over HTTP

Discovery Timeline

2026-08-18 - CVE-2026-61342 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-61342

Vulnerability Analysis

The flaw resides in the Security component of Oracle Hyperion Calculation Manager. An unauthenticated attacker can reach the vulnerable functionality over HTTP without prior credentials. Exploitation is classified as difficult because it depends on specific conditions and requires interaction from a user other than the attacker. When those conditions are met, the attacker can obtain unauthorized read access to sensitive data managed by the application. The vulnerability impacts confidentiality only; integrity and availability are not affected by successful exploitation.

Root Cause

Oracle has not published detailed root-cause information beyond the advisory. The issue is scoped to the Security component of Oracle Hyperion Calculation Manager version 11.2.25.0.000. The requirement for user interaction combined with network reachability suggests an attacker-supplied request or resource that a legitimate user must engage with to trigger the disclosure. Refer to the Oracle Security Alert for authoritative advisory content.

Attack Vector

The attack vector is network-based via HTTP. The attacker does not need valid credentials but must convince an authorized user to perform an action that triggers the vulnerable code path. Because the scope is unchanged and the impact is limited to confidentiality, an attacker who succeeds gains read access to data reachable by the Calculation Manager service rather than lateral movement or code execution. Public exploit code is not currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

No public proof-of-concept code has been published. See the Oracle Security Alert for vendor guidance.

Detection Methods for CVE-2026-61342

Indicators of Compromise

Unexpected HTTP requests to Oracle Hyperion Calculation Manager endpoints originating from untrusted networks or unusual user agents.
Anomalous outbound data transfers from the Calculation Manager host following inbound HTTP activity.
Web server or application logs showing access to Security component URIs from sessions lacking prior authentication.

Detection Strategies

Review Oracle Hyperion Calculation Manager access logs for HTTP requests to Security component paths correlated with user-clicked links or redirected sessions.
Baseline normal HTTP traffic to 11.2.25.0.000 deployments and alert on deviations in request volume, source geography, or referrer values.
Correlate proxy, web application firewall (WAF), and endpoint telemetry to identify user interaction patterns that could indicate social-engineering-driven exploitation.

Monitoring Recommendations

Enable verbose HTTP access logging on Oracle Hyperion Calculation Manager and forward logs to a centralized analytics platform.
Monitor for phishing campaigns targeting Hyperion users, since exploitation requires user interaction.
Track privileged data access events within Calculation Manager to detect unusual read patterns after suspicious HTTP requests.

How to Mitigate CVE-2026-61342

Immediate Actions Required

Apply Oracle's August 2026 Critical Patch Update fixes for Oracle Hyperion Calculation Manager as described in the Oracle Security Alert.
Inventory all Oracle Hyperion Calculation Manager instances running 11.2.25.0.000 and prioritize patching internet-adjacent deployments.
Restrict HTTP access to Calculation Manager to trusted internal networks and authenticated VPN users.

Patch Information

Oracle addressed CVE-2026-61342 in its August 2026 Critical Patch Update. Administrators should consult the Oracle Security Alert for patch identifiers and version guidance specific to Oracle Hyperion Calculation Manager 11.2.25.0.000.

Workarounds

Place Oracle Hyperion Calculation Manager behind a WAF configured to inspect and filter HTTP requests to Security component endpoints.
Enforce network segmentation so that Calculation Manager is not reachable from untrusted zones.
Train Hyperion users to recognize phishing and untrusted links, since exploitation depends on user interaction.

bash

# Example: restrict HTTP access to Calculation Manager to a trusted subnet
# (adjust interface, subnet, and port to match your environment)
iptables -A INPUT -p tcp --dport 8080 -s 10.10.0.0/16 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP