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CVE-2026-46818 is a high‑severity flaw in the File Transmission component of Oracle Payments within Oracle E‑Business Suite (versions 12.2.3‑12.2.15).
The vulnerability arises from improper input validation and authentication bypass in the module responsible for secure file exchanges (e.g., payment instruction files, vendor bank details, or settlement reports).
An unauthenticated attacker with network access via HTTPS can send specially crafted requests to the File Transmission endpoint, exploiting the lack of rigorous input sanitization.
Because the component processes external files without adequately validating their origin or content, the attacker can inject malicious payloads that manipulate file‑handling logic.
The attack complexity is high (AC:H), meaning exploitation requires non‑trivial conditions such as precise timing, knowledge of internal file structures, or the ability to trigger specific race conditions.
Nevertheless, no privileges or user interaction are needed (PR:N, UI:N), and the attack is launched remotely over the network (AV:N) with no required pre‑authentication.
Once the attack succeeds, it grants the adversary unauthorized creation, deletion, or modification access to critical payment data, as well as complete read access to all Oracle Payments accessible information (confidentiality and integrity impacts are high).
The CVSS 3.1 base score is 7.4, reflecting the significant risk to data confidentiality and integrity.
Affected versions include all Oracle E‑Business Suite releases from 12.2.3 through 12.2.15, which are widely deployed in financial and enterprise environments.
The File Transmission component typically processes sensitive files that include customer payment records, vendor bank account numbers (IBAN/SWIFT), and automated clearing house (ACH) batches.
An attacker who successfully exploits this vulnerability can read, alter, delete, or insert arbitrary data into these files, bypassing all role‑based access controls.
Because the vulnerability does not affect availability (A:N), the system remains operational, allowing the attacker to operate stealthily over extended periods.
The CVSS vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N) confirms that the scope is unchanged, meaning the impact is confined to Oracle Payments and does not automatically spread to other products.
The difficulty of exploitation (AC:H) may stem from the need to circumvent file‑type filtering, manipulate file path references, or trigger a race condition between file upload and processing routines.
Real‑world reconnaissance could involve enumerating the File Transmission endpoints (e.g., /payments/filetransmission/) and sending malformed POST requests with crafted multipart/form‑data attachments.
If successful, the attacker gains the ability to modify payment instructions before they are sent to banks, leading to financial fraud, or to exfiltrate sensitive vendor banking data for extortion.
The vulnerability is considered high risk because it directly compromises both confidentiality and integrity of core financial data without requiring any prior access.
Mitigation requires applying the Critical Patch Update (CPU) released by Oracle (expected July 2026), or isolating the File Transmission component behind strict network access controls.
This flaw is a classic example of how insecure direct object references (IDOR) or improper input validation in file‑handling modules can lead to complete data compromise in enterprise financial systems.
DailyCVE Form:
Platform: Oracle EBS
Version: 12.2.3‑12.2.15
Vulnerability : File Transmission
Severity: High (7.4)
date: 2026‑05‑28
Prediction: July 2026
What Undercode Say:
Check Oracle Payments version sqlplus apps/apps_password <<EOF SELECT version FROM fnd_product_groups; EXIT; EOF Scan for File Transmission endpoints nmap -p 443 --script http-enum <target> | grep -i "payments/filetransmission" Simulate a malformed file upload (conceptual) curl -X POST https://<target>/payments/filetransmission/upload \ -H "Content-Type: multipart/form-data" \ -F "file=@/dev/null;filename=\"../../config/passwd\"" Monitor for unauthorized file modifications auditctl -w /oracle/apps/payments/data/ -p wa -k CVE‑2026‑46818
Exploit:
- Identify HTTPS‑reachable Oracle Payments server with File Transmission endpoint (e.g.,
/payments/filetransmission/upload). - Craft a POST request with a multipart payload that includes path traversal sequences (
../) to escape the intended upload directory. - Submit a file whose content includes SQL/XML injection vectors to manipulate internal file processing logic.
- Trigger the race condition by simultaneously sending multiple overlapping file‑write requests.
- After successful exploitation, read critical files (e.g.,
payment_instructions.dat) using a separate GET request or by observing system responses.
Protection:
- Apply Oracle’s July 2026 Critical Patch Update (CPU) immediately.
- Restrict network access to the File Transmission endpoint using firewall rules or Web Application Firewall (WAF).
- Enable Oracle E‑Business Suite’s native file integrity monitoring to alert on unexpected file creations/deletions.
- Implement strict input validation and output encoding for all file‑handling modules.
Impact:
- Unauthorized read, creation, deletion, or modification of all Oracle Payments data, including payment files, vendor banking details, and settlement records.
- Financial fraud through manipulation of payment instructions before transmission to banks.
- Data exfiltration leading to vendor impersonation or supply‑chain compromise.
- Regulatory non‑compliance (e.g., PCI DSS, SOX) due to loss of data integrity and confidentiality.
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Sources:
Reported By: nvd.nist.gov
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