CVE-2026-83090: Oracle Spares Management Auth Bypass Flaw

CVE-2026-83090 Overview

CVE-2026-83090 is a high-severity vulnerability in the Oracle Spares Management product of Oracle E-Business Suite, within the Internal Operations component. The flaw affects supported versions 12.2.3 through 12.2.15. A low-privileged attacker with network access over HTTP can exploit the weakness without user interaction. Successful exploitation results in full takeover of Oracle Spares Management, compromising confidentiality, integrity, and availability. The root weakness is categorized as [CWE-284] Improper Access Control. Oracle addressed the issue in the Oracle Security Alert CSPUSEP2026.

Critical Impact
Authenticated attackers with minimal privileges can achieve complete takeover of Oracle Spares Management over the network via HTTP.

Affected Products

Oracle E-Business Suite - Oracle Spares Management 12.2.3
Oracle E-Business Suite - Oracle Spares Management versions 12.2.4 through 12.2.14
Oracle E-Business Suite - Oracle Spares Management 12.2.15

Discovery Timeline

2026-09-15 - CVE-2026-83090 published to NVD
2026-09-17 - Last updated in NVD database

Technical Details for CVE-2026-83090

Vulnerability Analysis

The vulnerability resides in the Internal Operations component of Oracle Spares Management, part of Oracle E-Business Suite. The weakness maps to [CWE-284] Improper Access Control, meaning access decisions are enforced incorrectly for certain HTTP-exposed operations.

An authenticated attacker with only low privileges on the E-Business Suite instance can invoke functionality that should be restricted. Because access checks are missing or misapplied, the attacker can escalate control over the Spares Management module. The end result is full compromise of the module's data and operations, spanning confidentiality, integrity, and availability.

Oracle does not publish exploit specifics with its Critical Patch Update and Security Alert disclosures. Refer to the Oracle Security Alert CSPUSEP2026 for authoritative technical guidance and patch mappings.

Root Cause

The root cause is improper access control ([CWE-284]) in the Internal Operations component of Oracle Spares Management. Authorization logic fails to consistently restrict privileged actions to properly entitled users, allowing a low-privileged authenticated session to reach sensitive functionality.

Attack Vector

The attack vector is network-based over HTTP against the E-Business Suite front end. The attacker must hold a valid low-privileged account but does not require user interaction. Exploitation complexity is low, and the scope remains unchanged within the Spares Management module.

No public proof-of-concept exploit is currently referenced in the enriched data, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The current EPSS probability is 0.447%.

Detection Methods for CVE-2026-83090

Indicators of Compromise

Unexpected HTTP requests to Oracle Spares Management endpoints under /OA_HTML/ originating from low-privileged accounts.
Sessions from standard user accounts invoking administrative or Internal Operations functions in Spares Management.
Anomalous modifications to spares inventory records, parts allocations, or service logistics data outside normal business workflows.

Detection Strategies

Enable and review Oracle E-Business Suite Sign-On Audit and Page Access Tracking to identify unusual navigation into Spares Management functions.
Correlate authentication logs with application-tier HTTP access logs to spot low-privileged accounts reaching Internal Operations pages.
Baseline normal user-to-function mappings for the Spares Management responsibility, then alert on deviations.

Monitoring Recommendations

Forward Oracle E-Business Suite application, database, and HTTP server logs to a centralized analytics platform for continuous review.
Monitor for privilege changes on E-Business Suite responsibilities that grant Spares Management access.
Alert on outbound connections from the E-Business Suite application tier that deviate from established baselines.

How to Mitigate CVE-2026-83090

Immediate Actions Required

Apply the fixes referenced in Oracle Security Alert CSPUSEP2026 to all Oracle E-Business Suite 12.2.3 through 12.2.15 instances running Spares Management.
Inventory all E-Business Suite environments, including non-production, and confirm patch status against the alert's advisory matrix.
Rotate credentials for accounts that hold Spares Management responsibilities as a precaution.

Patch Information

Oracle released remediation as part of the out-of-cycle Security Alert CSPUSEP2026. Administrators should follow Oracle's patch application instructions for E-Business Suite 12.2 and verify successful deployment using Oracle's supplied validation steps. Consult the Oracle Security Alert CSPUSEP2026 for version-specific patch identifiers.

Workarounds

Restrict network access to the E-Business Suite application tier so that only authorized internal users can reach HTTP endpoints.
Review and tighten E-Business Suite responsibilities and menus that expose Spares Management Internal Operations functions to non-administrative users.
Enforce multi-factor authentication on all E-Business Suite accounts to reduce the impact of low-privileged credential compromise.

bash

# Configuration example: restrict access to EBS Spares Management endpoints at the reverse proxy
# (Adjust paths and CIDRs to match your Oracle E-Business Suite deployment)
location /OA_HTML/ {
    allow 10.0.0.0/8;
    deny  all;
    proxy_pass http://ebs-app-tier.internal;
}