Oracle Siebel Apps up to 26.9 Financial Accounts improper authorization

Summaryinfo

A vulnerability was found in Oracle Siebel Apps up to 26.9. It has been rated as critical. Affected is an unknown function of the component Financial Accounts. Performing a manipulation results in improper authorization. This vulnerability is reported as CVE-2026-91430. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in Oracle Siebel Apps up to 26.9. This affects an unknown function of the component Financial Accounts. The manipulation with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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).

The advisory is shared at oracle.com. This vulnerability is uniquely identified as CVE-2026-91430 since 09/15/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/21/2026). MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Customer Relationship Management System

Vendor

• Oracle

Name

• Siebel Apps

Version

• 26.0
• 26.1
• 26.2
• 26.3
• 26.4
• 26.5
• 26.6
• 26.7
• 26.8
• 26.9

License

• commercial

Website

• Vendor: https://www.oracle.com

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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