CVE-2026-83167: Oracle E-Business Suite Data Disclosure

CVE-2026-83167 Overview

CVE-2026-83167 is an information disclosure vulnerability in the Oracle Application Object Library (AOL) component of Oracle E-Business Suite. The flaw affects supported versions 12.2.3 through 12.2.15. An unauthenticated attacker with network access via HTTP can exploit this vulnerability without user interaction. Successful exploitation results in unauthorized read access to critical data managed by the Oracle Application Object Library.

Critical Impact
Remote, unauthenticated attackers can obtain complete access to all data reachable through the Oracle Application Object Library component over HTTP.

Affected Products

Oracle E-Business Suite 12.2.3 through 12.2.15
Oracle Application Object Library (Core component)
Deployments exposing E-Business Suite HTTP endpoints

Discovery Timeline

2026-09-15 - CVE-2026-83167 published to NVD
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-83167

Vulnerability Analysis

The vulnerability resides in the Core component of the Oracle Application Object Library, a foundational framework used by Oracle E-Business Suite modules for session management, form serving, and shared services. The defect permits an unauthenticated remote actor to reach protected data through HTTP requests. The confidentiality impact is high, while integrity and availability are unaffected. This aligns with an information disclosure class weakness rather than code execution or tampering.

Because Oracle E-Business Suite frequently hosts financial, HR, and supply chain data, the exposed records may include sensitive business information. Attackers can chain disclosed data with follow-on attacks such as credential reuse or targeted phishing against identified users.

Root Cause

Oracle has not published detailed root-cause analysis. Based on the vulnerability profile, the flaw stems from missing authorization or insufficient access control on a network-reachable interface in the Application Object Library Core. See the Oracle Security Alert CSPUSEP2026 for vendor-supplied details.

Attack Vector

Exploitation requires only network access to the E-Business Suite HTTP listener. No authentication, privileges, or user interaction are required. Attack complexity is low, meaning a repeatable request sequence can reliably retrieve sensitive data. Internet-exposed E-Business Suite deployments face the highest immediate risk.

No public proof-of-concept exploit is currently listed for CVE-2026-83167. The vulnerability mechanism is described in prose because no verified exploit code is available. Refer to the vendor advisory for technical remediation specifics.

Detection Methods for CVE-2026-83167

Indicators of Compromise

Anomalous unauthenticated HTTP requests to Oracle E-Business Suite endpoints, particularly to Application Object Library servlets and JSP paths under /OA_HTML/.
Large or repeated outbound responses from oacore managed servers to unfamiliar client IP addresses.
Access log entries lacking valid session cookies yet returning HTTP 200 responses with substantial payloads.

Detection Strategies

Baseline normal request patterns to E-Business Suite HTTP endpoints and alert on volume spikes from single external sources.
Inspect web tier and reverse proxy logs for requests targeting Application Object Library URIs without authenticated session identifiers.
Correlate WAF telemetry with database audit records to identify unauthorized enumeration of FND_ schema objects.

Monitoring Recommendations

Enable verbose access logging on the Oracle HTTP Server tier and forward logs to a centralized analytics platform.
Monitor for scanner user-agents and known reconnaissance patterns targeting Oracle E-Business Suite paths.
Track EPSS movement for CVE-2026-83167 (currently 0.316%) to detect changes in exploitation likelihood.

How to Mitigate CVE-2026-83167

Immediate Actions Required

Apply the patches referenced in the Oracle Security Alert CSPUSEP2026 to all E-Business Suite instances running versions 12.2.3 through 12.2.15.
Restrict inbound HTTP access to Oracle E-Business Suite to trusted networks and VPN clients until patching completes.
Review web tier access logs for the past 90 days for signs of unauthenticated data retrieval.

Patch Information

Oracle released fixes for CVE-2026-83167 as part of Security Alert CSPUSEP2026. Administrators should download the applicable patch for their exact E-Business Suite release from My Oracle Support and apply it following the alert's installation instructions.

Workarounds

Place the E-Business Suite HTTP tier behind a web application firewall with rules that reject unauthenticated requests to Application Object Library resources.
Enforce network segmentation so that only authorized corporate ranges can reach the oacore managed server ports.
Disable or block internet exposure of non-essential Oracle E-Business Suite modules while patch deployment is in progress.

bash

# Example: restrict inbound access to Oracle E-Business Suite HTTP tier
iptables -A INPUT -p tcp --dport 8000 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 8000 -j DROP