CVE-2026-91389: Medium severity Oracle Siebel CRM End User vulnerability
Vulnerability in the Siebel CRM End User product of Oracle Siebel CRM (component: Open UI). Supported versions that are affected are 17.0-26.9. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel CRM End User. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Siebel CRM End User, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Siebel CRM End User accessible data as well as unauthorized read access to a subset of Siebel CRM End User accessible data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).
Affected Software
Event History
Frequently Asked Questions
Which deployments are affected?
Oracle Siebel CRM End User deployments using the Open UI component in supported versions 17.0 through 26.9 are affected.
What does an attacker need to exploit this issue?
The attacker needs low-privileged access, network access to the target over HTTP, and human interaction from someone other than the attacker. The attack complexity is rated low.
Are unauthenticated attackers able to exploit it?
No. The CVSS vector specifies low privileges required, so the attacker must already have a low-privileged account or equivalent access.
What could a successful attack allow?
A successful attack can allow unauthorized reading of a subset of accessible data and unauthorized updating, inserting, or deleting of some accessible data. The vulnerability can also significantly affect additional products because its scope changes beyond Siebel CRM End User.