CVE-2026-61247: Oracle Workflow Auth Bypass Vulnerability

CVE-2026-61247 Overview

CVE-2026-61247 is a vulnerability in the Oracle Workflow component of Oracle E-Business Suite, specifically affecting the Workflow Notification Mailer. The flaw impacts supported versions 12.2.3 through 12.2.15. An unauthenticated attacker with network access via Simple Mail Transfer Protocol (SMTP) can exploit the weakness to compromise Oracle Workflow. Successful exploitation permits unauthorized update, insert, or delete operations against a subset of Oracle Workflow data and can trigger a partial denial of service. The underlying weakness is classified as [CWE-306] Missing Authentication for Critical Function.

Critical Impact
Unauthenticated SMTP-based attacks can modify Workflow data and degrade the availability of the Workflow Notification Mailer service.

Affected Products

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

Discovery Timeline

2026-07-21 - Oracle publishes the fix in the Oracle Security Alert July 2026
2026-07-21 - CVE-2026-61247 published to the National Vulnerability Database (NVD)
2026-07-22 - Last updated in the NVD database

Technical Details for CVE-2026-61247

Vulnerability Analysis

The Workflow Notification Mailer processes inbound and outbound email messages that drive Oracle Workflow business processes. The mailer receives SMTP traffic and translates message content into workflow actions such as approvals, rejections, and notification responses. A missing authentication control on this SMTP-facing processing path allows an unauthenticated actor to submit crafted messages that the mailer treats as legitimate workflow input.

Because the mailer maps message content back to workflow records, an attacker who reaches the SMTP interface can influence Workflow data used by dependent E-Business Suite modules. Exploitation is rated as difficult under Oracle's assessment, and impact is limited to partial integrity and partial availability loss — confidentiality is not affected.

The Exploit Prediction Scoring System (EPSS) probability for this CVE is 0.268%. No public proof-of-concept, exploit code, or CISA Known Exploited Vulnerabilities (KEV) listing exists at the time of publication.

Root Cause

The root cause is Missing Authentication for a Critical Function [CWE-306] in the Workflow Notification Mailer's SMTP message handling. The mailer accepts and acts on messages without adequately verifying that the sender is an authenticated Workflow participant, allowing crafted email input to drive privileged workflow actions.

Attack Vector

The attack vector is network-based over SMTP. An attacker who can deliver mail to the Workflow Notification Mailer submits crafted messages that impersonate legitimate workflow responses or notifications. Successful messages result in unauthorized insert, update, or delete operations against Oracle Workflow data, or degradation of the mailer service leading to partial denial of service.

No verified public exploit code is available. See the Oracle Security Alert July 2026 for vendor-provided technical detail.

Detection Methods for CVE-2026-61247

Indicators of Compromise

Inbound SMTP messages to the Workflow Notification Mailer address from senders that do not correspond to provisioned Workflow users or approved relays.
Unexpected WF_NOTIFICATIONS state transitions (approvals, rejections, or cancellations) that do not correlate with an authenticated user session in E-Business Suite audit logs.
Spikes in mailer processing errors, deferred queues, or restarts of the Notification Mailer service in the Oracle Applications Manager.

Detection Strategies

Correlate SMTP receipt logs on the mailer host with Workflow notification response records to identify actions with no matching authenticated user activity.
Monitor E-Business Suite database audit trails for insert, update, or delete operations against Workflow tables originating from the mailer processing account outside normal business patterns.
Alert on malformed or oversized inbound messages targeting the Notification Mailer inbox, and on messages whose reply-to metadata does not match the original notification recipient.

Monitoring Recommendations

Forward SMTP gateway, mailer, and E-Business Suite concurrent manager logs to a centralized analytics platform for correlation and long-term retention.
Baseline normal Notification Mailer throughput and alert on deviations that indicate flooding or targeted abuse.
Track the health and restart frequency of the Workflow Notification Mailer service component to detect partial denial-of-service conditions.

How to Mitigate CVE-2026-61247

Immediate Actions Required

Apply the July 2026 Critical Patch Update from Oracle to all Oracle E-Business Suite environments running Oracle Workflow versions 12.2.3 through 12.2.15.
Restrict SMTP connectivity to the Workflow Notification Mailer so that only trusted, authenticated mail relays can deliver messages to the inbound processing mailbox.
Review recent Workflow notification actions and mailer logs for suspicious activity that predates patch application.

Patch Information

Oracle addressed CVE-2026-61247 in the July 2026 Critical Patch Update. Administrators should install the fixes referenced in the Oracle Security Alert July 2026 against each affected Oracle E-Business Suite 12.2 environment. Verify the patch level of the Oracle Workflow component after installation and confirm the Notification Mailer restarts cleanly.

Workarounds

Place the Notification Mailer's inbound mailbox behind an authenticated SMTP submission service and reject anonymous inbound relay.
Enforce Sender Policy Framework (SPF), DomainKeys Identified Mail (DKIM), and Domain-based Message Authentication, Reporting and Conformance (DMARC) checks on inbound mail to the mailer.
Where feasible, temporarily disable inbound response processing on the Notification Mailer until the patch is deployed, accepting the loss of email-based approvals.

bash

# Example: restrict inbound SMTP to the Workflow Notification Mailer host
# Replace 203.0.113.10 with your trusted mail relay IP
iptables -A INPUT -p tcp --dport 25 -s 203.0.113.10 -j ACCEPT
iptables -A INPUT -p tcp --dport 25 -j DROP