CVE-2026-91430

Analyzed Analyzed - Analysis Complete

Authentication Bypass in Siebel Apps - Financial Services

Publication date: 2026-10-20

Last updated on: 2026-11-04

Assigner: Oracle

Description

Vulnerability in the Siebel Apps - Financial Services product of Oracle Siebel CRM (component: Financial Accounts). Supported versions that are affected are 17.0-26.9. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel Apps - Financial Services. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Siebel Apps - Financial Services accessible data as well as unauthorized update, insert or delete access to some of Siebel Apps - Financial Services accessible data. CVSS 3.1 Base Score 6.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N).

CVSS Scores

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Meta Information

Published

2026-10-20

Last Modified

2026-11-04

Generated

2026-11-10

AI Q&A

2026-10-21

EPSS Evaluated

2026-11-08

NVD

CVE-2026-91430

EUVD

EUVD-2026-106680

Affected Vendors & Products

Vendor	Product	Version / Range
oracle	siebel_crm	From 17.0 (inc) to 26.9 (inc)

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 vulnerability affects Oracle Siebel CRM's Financial Services component (versions 17.0-26.9). It allows an unauthenticated attacker with network access via HTTP to potentially compromise the system. Successful exploitation could lead to unauthorized access to critical data or complete access to all accessible data in Siebel Apps - Financial Services, as well as unauthorized data modification capabilities.

Detection Guidance

This vulnerability is difficult to exploit and requires network access via HTTP. Detection may involve monitoring for unauthorized access attempts or unusual data modifications in Siebel Apps - Financial Services. Check Oracle's security advisories and apply patches for versions 17.0-26.9.

Impact Analysis

If exploited, this vulnerability could allow attackers to steal sensitive financial data, modify or delete critical records, or gain full control over the Siebel Apps - Financial Services system. This could disrupt financial operations, lead to data breaches, or cause financial losses depending on the organization's use of the system.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR (due to unauthorized data access) and HIPAA (if protected health information is exposed). Organizations using affected versions may face regulatory fines, legal liabilities, and reputational damage if this vulnerability is exploited.

Mitigation Strategies

Apply the latest security patches from Oracle for Siebel Apps - Financial Services versions 17.0-26.9. Restrict network access to HTTP ports used by the application. Monitor for unauthorized access or data changes in the Financial Services component.

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