CVE-2026-83110: Oracle Marketing Auth Bypass Vulnerability

CVE-2026-83110 Overview

CVE-2026-83110 is an access control vulnerability [CWE-284] in the Audience component of Oracle Marketing, part 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 the vulnerability to gain unauthorized read access to Oracle Marketing data. Oracle documented the issue in its September 2026 Security Alert advisory.

Critical Impact
Successful exploitation allows an unauthenticated remote attacker to read all data accessible to the Oracle Marketing application, exposing customer marketing datasets and audience records.

Affected Products

Oracle E-Business Suite Marketing 12.2.3 through 12.2.15
Oracle Marketing Audience component
Deployments exposing Oracle E-Business Suite HTTP endpoints to untrusted networks

Discovery Timeline

2026-09-15 - CVE-2026-83110 published to the National Vulnerability Database
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-83110

Vulnerability Analysis

The vulnerability resides in the Audience component of Oracle Marketing within Oracle E-Business Suite. An attacker communicates with the affected HTTP interface and bypasses the access controls that should restrict data reads to authenticated users. The flaw impacts confidentiality only; integrity and availability are not affected according to Oracle's advisory.

Oracle categorizes the issue as easily exploitable, meaning an attacker requires no privileges, no user interaction, and no local access. The mapped weakness class is Improper Access Control [CWE-284], indicating the application fails to enforce authorization before returning sensitive Audience data. The Exploit Prediction Scoring System (EPSS) currently estimates the near-term exploitation probability at a low level, but exposure of production E-Business Suite instances should be treated as high risk given the ease of exploitation.

Root Cause

The root cause is missing or insufficient authorization enforcement in the Oracle Marketing Audience module. HTTP requests to the affected endpoints reach data-retrieval logic without validating that the caller holds a valid session or the required privileges. Oracle has not published a code-level breakdown, but the CWE-284 mapping is consistent with a broken access control pattern where server-side authorization checks are absent or incorrectly evaluated.

Attack Vector

Exploitation occurs entirely over the network using HTTP. An attacker sends crafted requests directly to the Oracle Marketing Audience endpoints exposed by an affected E-Business Suite instance. Because no authentication is required, the attack can originate from any host with network reachability to the application tier. Successful requests return Oracle Marketing data the caller is not authorized to view.

See the Oracle Security Alert Advisory for vendor-provided technical guidance and patch references.

Detection Methods for CVE-2026-83110

Indicators of Compromise

Unauthenticated HTTP requests to Oracle Marketing Audience URL paths returning HTTP 200 responses with data payloads
Anomalous outbound data volumes from Oracle E-Business Suite application tier hosts
Requests to Marketing endpoints from source IP addresses not associated with legitimate business users or integrations

Detection Strategies

Review Oracle E-Business Suite HTTP access logs for requests to Marketing Audience endpoints without a preceding authentication event
Correlate application-tier logs with network flow data to identify unauthenticated sessions retrieving Audience records
Alert on user-agent strings and request patterns inconsistent with sanctioned Oracle E-Business Suite integrations

Monitoring Recommendations

Enable verbose logging on Oracle HTTP Server and forward logs to a centralized analytics platform
Baseline normal request volumes to Marketing Audience endpoints and alert on statistical deviations
Monitor for scanning behavior probing Oracle E-Business Suite paths from external or DMZ-adjacent networks

How to Mitigate CVE-2026-83110

Immediate Actions Required

Apply the Oracle Critical Patch Update referenced in the September 2026 Security Alert to all Oracle E-Business Suite instances running versions 12.2.3 through 12.2.15
Inventory internet-exposed Oracle E-Business Suite deployments and restrict Marketing Audience endpoints to trusted networks until patched
Review historical HTTP access logs for prior unauthenticated requests to affected Marketing endpoints

Patch Information

Oracle addresses CVE-2026-83110 in the September 2026 Security Alert. Administrators should consult the Oracle Security Alert Advisory for patch identifiers, prerequisites, and post-installation validation steps specific to their Oracle E-Business Suite release.

Workarounds

Place Oracle E-Business Suite behind an authenticating reverse proxy or web application firewall that blocks unauthenticated access to Marketing Audience URL paths
Restrict inbound network access to the Oracle E-Business Suite application tier to known corporate ranges and VPN gateways
Disable the Oracle Marketing Audience module if it is not required for business operations, following Oracle's supported deactivation procedures

bash

# Example: restrict access to Oracle Marketing Audience paths at the reverse proxy
# (adapt to your deployment; consult Oracle documentation before production changes)
location ~* ^/OA_HTML/.*Audience.* {
    allow 10.0.0.0/8;
    allow 192.168.0.0/16;
    deny all;
    proxy_pass http://ebs-app-tier;
}