CVE-2026-61278: Oracle Workflow Auth Bypass Vulnerability

CVE-2026-61278 Overview

CVE-2026-61278 is an access control vulnerability [CWE-284] in the Oracle Workflow product of Oracle E-Business Suite. The flaw resides in the Workflow Notification Mailer component and affects supported versions 12.2.3 through 12.2.15. A low-privileged attacker with network access via HTTP can exploit the weakness to compromise Oracle Workflow. Successful exploitation allows unauthorized update, insert, or delete access to a subset of Oracle Workflow data, unauthorized read access to a subset of Workflow data, and the ability to cause a partial denial of service. Oracle disclosed the issue in its July 2026 Critical Patch Update.

Critical Impact
Authenticated attackers with low privileges can reach Oracle Workflow over HTTP to alter data, read a subset of records, and trigger partial denial of service against the Notification Mailer component.

Affected Products

Oracle E-Business Suite — Oracle Workflow, version 12.2.3
Oracle E-Business Suite — Oracle Workflow, versions 12.2.4 through 12.2.14
Oracle E-Business Suite — Oracle Workflow, version 12.2.15

Discovery Timeline

2026-07-21 - CVE-2026-61278 published to NVD
2026-07-22 - Last updated in NVD database

Technical Details for CVE-2026-61278

Vulnerability Analysis

CVE-2026-61278 affects the Workflow Notification Mailer, the component that sends and processes email-based workflow notifications in Oracle E-Business Suite. The weakness stems from improper access control [CWE-284], allowing a user with valid but low-privileged credentials to perform actions outside their authorization boundary.

An attacker who reaches the E-Business Suite over HTTP can invoke Workflow functionality that should be restricted. The scope is unchanged, meaning the impact is contained within Oracle Workflow. Confidentiality, integrity, and availability are all partially affected: the attacker can modify a subset of Workflow-accessible records, read a subset of records they should not view, and degrade Workflow service availability.

Root Cause

The root cause is an access control gap [CWE-284] within the Workflow Notification Mailer. Authorization checks do not adequately restrict which Workflow operations a low-privileged authenticated user can invoke. As a result, permitted request paths expose data and actions intended for higher-privileged roles.

Attack Vector

The attack requires network access over HTTP and valid low-privileged credentials. No user interaction is required. Because the exploitation path is described by Oracle as easily exploitable, attackers who already have any authenticated foothold in E-Business Suite can pivot to Workflow data. No public proof-of-concept, exploit code, or in-the-wild exploitation has been reported at publication. The EPSS score is 0.272% (percentile 19.25).

No verified proof-of-concept code has been published. Refer to the Oracle Security Alert July 2026 for vendor-supplied technical details.

Detection Methods for CVE-2026-61278

Indicators of Compromise

Unexpected modification, insertion, or deletion of records in Oracle Workflow tables by low-privileged accounts.
Anomalous HTTP requests to Workflow Notification Mailer endpoints originating from user accounts that do not normally interact with Workflow administration.
Partial service disruption or degraded response times from the Workflow Notification Mailer process.
Workflow notification queues showing unexpected purges, replays, or configuration changes.

Detection Strategies

Audit Oracle E-Business Suite application logs and database audit trails for Workflow API calls made by accounts lacking Workflow administrator responsibilities.
Correlate HTTP access logs against the E-Business Suite user role model to surface authorization anomalies against Workflow endpoints.
Baseline normal Workflow Notification Mailer throughput and alert on statistically significant deviations that may indicate abuse or partial DoS.

Monitoring Recommendations

Forward Oracle E-Business Suite application, database, and web tier logs to a centralized analytics platform for cross-source correlation.
Enable Oracle Fine-Grained Auditing (FGA) on sensitive Workflow tables to record read and write access by user session.
Monitor Workflow Notification Mailer service health and queue depth continuously, and alert on service restarts or unexpected configuration reloads.

How to Mitigate CVE-2026-61278

Immediate Actions Required

Apply the July 2026 Oracle Critical Patch Update for E-Business Suite as soon as change windows permit.
Inventory all E-Business Suite environments running Oracle Workflow versions 12.2.3 through 12.2.15 and prioritize internet-exposed instances.
Review and tighten Workflow-related responsibilities and role grants, removing unnecessary Workflow access from standard user accounts.
Rotate credentials for any low-privileged accounts that show suspicious Workflow activity during log review.

Patch Information

Oracle addressed CVE-2026-61278 in the July 2026 Critical Patch Update. Administrators should download and apply the corresponding E-Business Suite patch as documented in the Oracle Security Alert July 2026. No supported workaround replaces the vendor patch.

Workarounds

Restrict network access to the E-Business Suite web tier using firewalls, VPN, or reverse proxies so only authorized users can reach Workflow endpoints.
Disable or limit the Workflow Notification Mailer where business processes permit until patching is complete.
Enforce least privilege by revoking Workflow responsibilities from accounts that do not require them.

bash

# Configuration example: restrict inbound HTTP access to the E-Business Suite web tier
# Replace <trusted_subnet> and <ebs_web_host> with environment-specific values
iptables -A INPUT -p tcp --dport 8000 -s <trusted_subnet> -d <ebs_web_host> -j ACCEPT
iptables -A INPUT -p tcp --dport 8000 -d <ebs_web_host> -j DROP