Oracle E-Business Suite Payments File Transmission Authentication Bypass and Remote Code Execution (CVE-2026-46817)

1. Apply Official Security Patches

Refer to the Oracle Critical Patch Update (CPU) advisory and apply the recommended patches immediately.

• Reference: Oracle Security Advisory

2. Temporary Mitigations

If patching cannot be performed immediately, implement the following workarounds to reduce exposure:

A. Network Access Control (ACL)

Restrict direct external internet access to Oracle Payments file transmission endpoints and HTTP ports. Configure firewall rules to allow access only from trusted internal IP ranges or secure VPNs.

B. WAF (Web Application Firewall) Rules

Deploy WAF rules to detect and block anomalous POST/GET requests targeting Oracle Payments servlets and related URI paths.

# Nginx Reverse Proxy Example: Restricting external access to Payments paths
location ~* /OA_HTML/(iby|payment) { 
    allow 10.0.0.0/8;
    allow 192.168.0.0/16;
    deny all;
}

C. Disable Execution Permissions on Upload Directories

Configure the web server to disable script execution (e.g., JSP execution) within the temporary and permanent storage directories used by the file transmission module.

This vulnerability (CVE-2026-46817) exists within the 'File Transmission' component of Oracle Payments, a critical financial transaction processing module in Oracle E-Business Suite.

An unauthenticated attacker with network access via HTTP can exploit this vulnerability without any user interaction (PR:N / UI:N). The root cause stems from missing authentication for critical functions (CWE-306, CWE-287) and improper privilege management (CWE-269), allowing attackers to abuse file transmission capabilities to upload and execute arbitrary malicious scripts or web shells.

With a CVSS 3.1 Base Score of 9.8, this vulnerability poses a critical threat to confidentiality, integrity, and availability. It has been added to the CISA KEV catalog due to active exploitation in the wild, making immediate remediation imperative.