CVE-2026-83433: Oracle Depot Repair Auth Bypass Vulnerability

CVE-2026-83433 Overview

CVE-2026-83433 affects the Depot Repair Diagnostics component of Oracle Depot Repair, part of Oracle E-Business Suite. Supported versions 12.2.3 through 12.2.15 are affected. An authenticated attacker with high privileges and network access via HTTP can compromise the application. Successful exploitation allows unauthorized creation, deletion, or modification of all Oracle Depot Repair accessible data. The same attack also grants unauthorized read access to critical Oracle Depot Repair data. Oracle disclosed the issue in Security Alert CSPUSEP2026.

Critical Impact
Authenticated attackers can read and modify all Oracle Depot Repair data over the network, breaching both confidentiality and integrity of a business-critical service management module.

Affected Products

Oracle E-Business Suite — Oracle Depot Repair 12.2.3
Oracle E-Business Suite — Oracle Depot Repair versions 12.2.4 through 12.2.14
Oracle E-Business Suite — Oracle Depot Repair 12.2.15

Discovery Timeline

2026-09-15 - CVE-2026-83433 published to NVD
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-83433

Vulnerability Analysis

The flaw resides in the Depot Repair Diagnostics component of Oracle Depot Repair. The affected component exposes HTTP-accessible functionality that lacks proper authorization enforcement over data operations. An authenticated user with elevated Oracle E-Business Suite privileges can invoke diagnostic routines to read, create, modify, or delete records belonging to the Depot Repair module. The attack proceeds without user interaction and does not affect availability, per the published CVSS vector. Because Depot Repair tracks service, warranty, and repair workflows, unauthorized data changes can disrupt customer service operations and downstream financial reporting. Oracle addressed the defect in Security Alert CSPUSEP2026, which is the authoritative reference for patch mapping.

Root Cause

Oracle has not published root-cause detail beyond the component identification. The advisory language describes broken access control within the diagnostics interface, allowing privileged users to reach data operations that should be restricted by function-level authorization. No CWE identifier has been assigned in NVD at the time of publication.

Attack Vector

Exploitation requires network access to the Oracle E-Business Suite HTTP interface and a valid high-privileged account. The attacker issues crafted HTTP requests to Depot Repair Diagnostics endpoints to trigger the unauthorized data operations. No client-side interaction is required. Public proof-of-concept code is not available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

No verified exploitation code is publicly available. Refer to the Oracle Security Alert CSPUSEP2026 for technical patch details.

Detection Methods for CVE-2026-83433

Indicators of Compromise

Unexpected create, update, or delete activity on Oracle Depot Repair tables originating from Diagnostics-related URLs.
HTTP requests to Depot Repair Diagnostics endpoints from user accounts that do not normally use diagnostic tooling.
Application audit records showing high-privileged users performing bulk data modifications outside standard business hours.

Detection Strategies

Enable Oracle E-Business Suite Sign-On Audit and Function Audit to log Diagnostics access and correlate with database DML operations.
Baseline normal Depot Repair workflow traffic and alert on deviations targeting Diagnostics URIs.
Review Oracle Fusion Middleware access logs for anomalous parameters or repeated requests against Depot Repair Diagnostics servlets.

Monitoring Recommendations

Forward Oracle E-Business Suite application, middleware, and database audit logs to a centralized SIEM for correlation and long-term retention.
Monitor privileged account usage against Depot Repair responsibilities and alert on privilege assignments outside a documented change process.
Track patch level of each E-Business Suite instance and alert when the CPU baseline drifts below the CSPUSEP2026 release.

How to Mitigate CVE-2026-83433

Immediate Actions Required

Apply the fixes from Oracle Security Alert CSPUSEP2026 to all Oracle E-Business Suite 12.2.3 through 12.2.15 environments.
Inventory accounts with high-privileged Depot Repair responsibilities and revoke access that is not required for business operations.
Restrict network reachability of the Oracle E-Business Suite HTTP tier to trusted management and user networks.

Patch Information

Oracle addresses CVE-2026-83433 in Security Alert CSPUSEP2026. Administrators should review the Oracle Security Alert CSPUSEP2026 for patch identifiers applicable to their Oracle E-Business Suite 12.2.x release and apply the corresponding patch through AutoPatch (adop) following Oracle's documented procedures.

Workarounds

Disable or restrict access to Depot Repair Diagnostics functions for users who do not require them, using Oracle E-Business Suite function security.
Place the Oracle E-Business Suite web tier behind a web application firewall and block unauthenticated or anomalous access to Diagnostics URIs.
Enforce multi-factor authentication for accounts holding elevated Depot Repair responsibilities to reduce credential-abuse risk.

bash

# Example: apply an Oracle E-Business Suite patch using AutoPatch (adop)
# Refer to Oracle Security Alert CSPUSEP2026 for the exact patch number
source $APPL_TOP/EBSapps.env run
adop phase=prepare
adop phase=apply patches=<CSPUSEP2026_PATCH_ID> workers=8
adop phase=finalize
adop phase=cutover
adop phase=cleanup