CVE-2026-83425: Oracle E-Business Suite Auth Bypass Flaw

CVE-2026-83425 Overview

CVE-2026-83425 is a vulnerability in the Oracle Complex Maintenance, Repair and Overhaul (cMRO) product of Oracle E-Business Suite, within the Internal Operations component. The flaw affects supported versions 12.2.12 through 12.2.15. A low-privileged attacker with network access via HTTP can exploit the issue to compromise the application. Because the vulnerability introduces a scope change, successful attacks can impact additional Oracle products beyond cMRO. Exploitation can result in unauthorized access to all cMRO-accessible data and a partial denial of service condition. Oracle documented the issue in the Oracle Security Alert CSPUSEP2026.

Critical Impact
Authenticated remote attackers can read all data accessible to Oracle Complex Maintenance, Repair and Overhaul and cause partial denial of service, with impact extending beyond the vulnerable component due to scope change.

Affected Products

Oracle E-Business Suite - Complex Maintenance, Repair and Overhaul version 12.2.12
Oracle E-Business Suite - Complex Maintenance, Repair and Overhaul versions 12.2.13 and 12.2.14
Oracle E-Business Suite - Complex Maintenance, Repair and Overhaul version 12.2.15

Discovery Timeline

2026-09-15 - CVE-2026-83425 published to NVD
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-83425

Vulnerability Analysis

The vulnerability resides in the Internal Operations component of Oracle Complex Maintenance, Repair and Overhaul, part of Oracle E-Business Suite. An authenticated attacker holding low-level application privileges can send crafted HTTP requests to the vulnerable interface. The result is unauthorized read access to sensitive cMRO data and the ability to induce partial service disruption. The scope change property means the successful attack can affect resources beyond the security authority of the vulnerable component, extending impact to integrated Oracle E-Business Suite modules.

Root Cause

Oracle has not published the specific class of defect underlying CVE-2026-83425. Based on the CVSS metrics, the flaw permits a low-privileged user to bypass intended access boundaries within the Internal Operations component and read data across trust boundaries. The scope change indicates that authorization enforcement for cross-component data access is insufficient. Full technical details are limited to Oracle's security alert under Oracle's coordinated disclosure practice.

Attack Vector

Exploitation requires network access to the Oracle E-Business Suite HTTP interface and a valid low-privileged application account. The attacker issues crafted HTTP requests against the cMRO Internal Operations endpoints. No user interaction is required. Attack complexity is low, meaning no specialized conditions must be met to trigger the flaw. Because Oracle E-Business Suite is frequently exposed to internal networks and, in some deployments, to the internet, the attack surface can be substantial.

No verified exploit code is publicly available. Refer to the Oracle Security Alert CSPUSEP2026 for vendor-provided technical details.

Detection Methods for CVE-2026-83425

Indicators of Compromise

Unexpected HTTP requests to Oracle E-Business Suite cMRO Internal Operations endpoints from low-privileged user sessions.
Anomalous data export activity or large result set retrievals originating from cMRO application accounts.
Application log entries showing access to cMRO records outside a user's normal operational role.
Partial availability degradation of cMRO services correlated with unusual HTTP request patterns.

Detection Strategies

Enable Oracle E-Business Suite Sign-On Audit and application-level logging for the cMRO module, then baseline normal access patterns per user role.
Deploy web application firewall rules to log and inspect HTTP traffic targeting cMRO Internal Operations URIs.
Correlate authentication events with data-access volumes to flag low-privileged accounts performing broad data reads.

Monitoring Recommendations

Forward Oracle E-Business Suite application, database audit, and web tier logs to a centralized analytics platform.
Alert on repeated 4xx/5xx spikes on cMRO endpoints that may indicate probing or partial denial of service.
Monitor database session activity for FND_USER accounts issuing unusual queries against cMRO schemas.

How to Mitigate CVE-2026-83425

Immediate Actions Required

Apply the patches referenced in the Oracle Security Alert CSPUSEP2026 to all affected Oracle E-Business Suite environments running cMRO versions 12.2.12 through 12.2.15.
Inventory Oracle E-Business Suite deployments and confirm which instances have the Complex Maintenance, Repair and Overhaul module enabled.
Review and reduce the number of accounts holding cMRO application privileges, revoking access no longer required.
Restrict network exposure of Oracle E-Business Suite HTTP interfaces to trusted networks and VPN users only.

Patch Information

Oracle released fixes for CVE-2026-83425 as part of the CSPUSEP2026 Security Alert. Administrators should download and apply the corresponding Oracle E-Business Suite patch for their installed version (12.2.12 through 12.2.15) following Oracle's patch application procedures. Consult the Oracle Security Alert CSPUSEP2026 for exact patch identifiers, prerequisite requirements, and post-installation validation steps.

Workarounds

Place Oracle E-Business Suite behind a reverse proxy or web application firewall and restrict access to cMRO Internal Operations URIs to a defined set of source addresses.
Enforce least-privilege role assignments in Oracle E-Business Suite responsibilities that grant access to the cMRO module.
Enable enhanced auditing on cMRO functions until patches are applied and validate access patterns against role expectations.

bash

# Configuration example: no vendor-provided configuration workaround exists
# Apply the CSPUSEP2026 patch as the authoritative remediation.
# See: https://www.oracle.com/security-alerts/cspusep2026.html