CVE-2026-62602: Oracle Hyperion Auth Bypass Vulnerability

CVE-2026-62602 Overview

CVE-2026-62602 is a security vulnerability affecting the Oracle Hyperion Calculation Manager product of Oracle Hyperion, specifically in the Security component. The affected supported version is 11.2.25.0.000. An unauthenticated attacker with access to the physical communication segment attached to the hardware running the product can compromise Oracle Hyperion Calculation Manager. Successful exploitation can lead to unauthorized creation, deletion, or modification of critical data, along with unauthorized read access to all data accessible to the Calculation Manager. The vulnerability has a scope change, meaning attacks may significantly impact additional products beyond the vulnerable component.

Critical Impact
Unauthenticated adjacent-network attackers can gain full read and write access to Oracle Hyperion Calculation Manager data, with scope-changing impact on additional Oracle Hyperion products.

Affected Products

Oracle Hyperion Calculation Manager 11.2.25.0.000
Oracle Hyperion (Security component)
Additional Oracle products may be affected due to scope change

Discovery Timeline

2026-08-18 - CVE-2026-62602 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-62602

Vulnerability Analysis

The vulnerability resides in the Security component of Oracle Hyperion Calculation Manager. Exploitation requires the attacker to be positioned on the same physical communication segment as the target host. No authentication or user interaction is required. The attack complexity is high, indicating that specific conditions must be met for successful exploitation. Impact is limited to confidentiality and integrity, with no availability impact. The scope change indicates that a successful attack traverses the security boundary of the Calculation Manager and can affect other Oracle Hyperion components sharing the environment.

Root Cause

Oracle has not published root cause details beyond identifying the affected component as Security within Oracle Hyperion Calculation Manager version 11.2.25.0.000. Refer to the Oracle Security Alert for authoritative vendor information.

Attack Vector

The attack vector is Adjacent Network. An unauthenticated attacker must have access to the physical communication segment attached to the hardware where Oracle Hyperion Calculation Manager executes. From that position, the attacker sends crafted traffic to the Calculation Manager to achieve unauthorized read, create, delete, or modify operations against accessible data.

No verified public exploit code is available for CVE-2026-62602.
See the Oracle Security Alert for vendor-provided technical details:
https://www.oracle.com/security-alerts/cspuaug2026.html

Detection Methods for CVE-2026-62602

Indicators of Compromise

Unexpected create, modify, or delete operations against Calculation Manager artifacts and rules.
Anomalous read access to Hyperion business rules, formulas, or planning data by non-authenticated sessions.
Network traffic to Calculation Manager services originating from unauthorized hosts on the local segment.

Detection Strategies

Monitor Oracle Hyperion Calculation Manager audit logs for unauthorized data modification events without corresponding authentication records.
Inspect network flows on the segment hosting Hyperion for connections from unmanaged or unexpected devices.
Correlate application-layer errors with segment-local ARP or MAC anomalies that could indicate an on-path attacker.

Monitoring Recommendations

Enable verbose auditing on the Calculation Manager Security component and forward logs to a centralized SIEM.
Baseline normal client IP ranges for Calculation Manager and alert on deviations.
Track privileged operations affecting Hyperion metadata and rule sets in near real time.

How to Mitigate CVE-2026-62602

Immediate Actions Required

Apply the fixes published in the Oracle Security Alert for the August 2026 critical patch update.
Restrict network access to the Calculation Manager host so that only authorized management systems can reach it on the local segment.
Inventory all Oracle Hyperion Calculation Manager 11.2.25.0.000 deployments and prioritize patching.

Patch Information

Oracle has released a security update addressing CVE-2026-62602 as part of its August 2026 Critical Patch Update. Consult the Oracle Security Alert for the applicable patch identifiers and installation guidance.

Workarounds

Segment Hyperion infrastructure onto dedicated, tightly controlled VLANs with strict Layer 2 access controls.
Enforce port security, DHCP snooping, and dynamic ARP inspection on switches supporting the Hyperion segment.
Disable or firewall unused Calculation Manager network listeners until the patch is applied.

bash

# Example: restrict inbound access to Calculation Manager host using iptables
iptables -A INPUT -s 10.10.20.0/24 -p tcp --dport 8500 -j ACCEPT
iptables -A INPUT -p tcp --dport 8500 -j DROP