CVE-2026-70839: Oracle Financials Auth Bypass Vulnerability

CVE-2026-70839 Overview

CVE-2026-70839 is a network-exploitable vulnerability in the Oracle Financials for EMEA product within Oracle E-Business Suite. The flaw resides in the Internal Operations component and affects supported versions 12.2.3 through 12.2.15. A low-privileged attacker with HTTP network access can compromise the application without user interaction. Successful exploitation grants unauthorized access to all data accessible to Oracle Financials for EMEA and permits unauthorized insert, update, or delete operations on a subset of that data. Oracle disclosed the issue in the Oracle Security Alert August 2026.

Critical Impact
Authenticated attackers with low privileges can read all Oracle Financials for EMEA data and modify a subset of records over the network.

Affected Products

Oracle E-Business Suite - Oracle Financials for EMEA 12.2.3
Oracle E-Business Suite - Oracle Financials for EMEA versions 12.2.4 through 12.2.14
Oracle E-Business Suite - Oracle Financials for EMEA 12.2.15

Discovery Timeline

2026-08-18 - CVE CVE-2026-70839 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-70839

Vulnerability Analysis

The vulnerability resides in the Internal Operations component of Oracle Financials for EMEA. An authenticated attacker holding low-privilege application credentials can reach the vulnerable functionality through standard HTTP requests. Exploitation does not require user interaction and does not require crossing a security scope boundary.

Successful attacks compromise data confidentiality and integrity. An attacker gains complete read access to all data reachable by Oracle Financials for EMEA and can perform limited unauthorized insert, update, or delete actions. Availability is not affected.

Root Cause

Oracle has not disclosed detailed root cause information in the public advisory. The CVSS vector and functional impacts indicate a broken access control or authorization flaw within the Internal Operations component that permits low-privileged users to reach and manipulate data outside their intended scope.

Attack Vector

Attack traffic originates over the network via HTTP against the Oracle E-Business Suite web tier. The attacker must authenticate to the application with any low-privileged account. Once authenticated, the attacker issues requests to the Internal Operations component of Oracle Financials for EMEA to read or modify data beyond authorized boundaries. No client-side interaction or social engineering is required.

No public proof-of-concept exploit is currently available. See the Oracle Security Alert August 2026 for vendor-provided technical context.

Detection Methods for CVE-2026-70839

Indicators of Compromise

Unexpected HTTP requests from low-privileged Oracle E-Business Suite user sessions targeting Internal Operations endpoints within Oracle Financials for EMEA.
Database audit records showing SELECT, INSERT, UPDATE, or DELETE operations on Financials for EMEA tables initiated by accounts that historically do not access those objects.
Anomalous spikes in data export or record modification volume tied to non-administrative EBS accounts.

Detection Strategies

Enable and review Oracle E-Business Suite Sign-On Audit and page access tracking to identify requests to Internal Operations functions by unauthorized roles.
Correlate application session logs with database audit trails to flag privilege boundary violations against Financials for EMEA schemas.
Baseline normal HTTP request patterns to /OA_HTML/ and Financials for EMEA form endpoints, then alert on deviations from low-privileged accounts.

Monitoring Recommendations

Forward Oracle E-Business Suite application, middle-tier, and database audit logs into a centralized analytics platform for cross-source correlation.
Monitor for repeated failed and successful access attempts from a single low-privileged account against multiple Internal Operations resources.
Alert on modifications to Financials for EMEA reference data or transactional tables outside of scheduled batch windows.

How to Mitigate CVE-2026-70839

Immediate Actions Required

Apply the patches from the Oracle Security Alert August 2026 to all affected Oracle E-Business Suite environments running versions 12.2.3 through 12.2.15.
Review and reduce the population of user accounts with access to Oracle Financials for EMEA until patches are deployed.
Audit recent database and application activity against Financials for EMEA objects for evidence of unauthorized reads or modifications.

Patch Information

Oracle addressed CVE-2026-70839 in the August 2026 Security Alert. Administrators should identify the applicable Critical Patch Update bundle for their Oracle E-Business Suite release from the Oracle Security Alert August 2026, stage it in a non-production environment, and roll it forward to production following Oracle's documented patching procedures.

Workarounds

Restrict network access to the Oracle E-Business Suite web tier to trusted internal networks and VPN users only.
Temporarily remove or restrict responsibilities that grant access to Oracle Financials for EMEA Internal Operations functions for non-essential users.
Enforce strong password policies and multi-factor authentication on all Oracle E-Business Suite accounts to raise the bar for obtaining the low-privilege access required for exploitation.

bash

# Configuration example: enable Oracle E-Business Suite Sign-On Audit at FORM level
# Set the profile option 'Sign-On:Audit Level' to 'FORM' via System Administrator responsibility
# Then query audit data for suspicious Financials for EMEA access:
SELECT user_name, responsibility_name, form_name, start_time, end_time
  FROM applsys.fnd_login_resp_forms_v
 WHERE form_name LIKE '%JG%'
   AND start_time > SYSDATE - 7
 ORDER BY start_time DESC;