CVE-2026-91506

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Unauthenticated Remote Code Execution in Oracle E-Business Suite Workflow

Publication date: 2026-10-20

Last updated on: 2026-10-27

Assigner: Oracle

Description

Vulnerability in the Workflow product of Oracle E-Business Suite (component: Workflow Notification Mailer). Supported versions that are affected are 12.2.3-12.2.15. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Workflow. Successful attacks of this vulnerability can result in takeover of Workflow. CVSS 3.1 Base Score 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).

CVSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-10-27

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-91506

EUVD

EUVD-2026-106749

Affected Vendors & Products

Vendor	Product	Version / Range
Oracle Corporation	Workflow	12.2.3

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-306	The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

Attack-Flow Graph

Executive Summary

This is a vulnerability in Oracle E-Business Suite's Workflow product, specifically in the Workflow Notification Mailer component. It affects versions 12.2.3 to 12.2.15. The issue allows an unauthenticated attacker with network access via HTTP to potentially take over the Workflow system. The vulnerability has a CVSS base score of 8.1, indicating high impact on confidentiality, integrity, and availability.

Detection Guidance

Detection of CVE-2026-91506 requires checking for vulnerable versions of Oracle E-Business Suite Workflow (12.2.3 to 12.2.15). Inspect Oracle Workflow Notification Mailer logs for unusual activity or unauthorized access attempts. Monitor network traffic for HTTP requests targeting Workflow components. Ensure all Oracle E-Business Suite patches are up to date.

Impact Analysis

If exploited, an attacker could gain control of the Workflow system, leading to unauthorized access, data breaches, or disruption of services. This could affect sensitive business operations, workflow processes, and potentially lead to data theft or manipulation.

Compliance Impact

This vulnerability could lead to unauthorized access or disclosure of sensitive data, violating compliance requirements under GDPR, HIPAA, or other regulations. Organizations using affected versions may face legal penalties, reputational damage, and loss of trust due to potential data breaches.

Mitigation Strategies

Apply the latest Oracle E-Business Suite patches for Workflow component immediately. Restrict network access to HTTP ports for Workflow services. Monitor for unusual activity in Workflow Notification Mailer logs.

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