CVE-2026-91553 in PeopleSoft Enterprise FIN Product Configurator Brazil
Summary
by MITRE • 10/21/2026
Vulnerability in the PeopleSoft Enterprise FIN Product Configurator Brazil product of Oracle PeopleSoft (component: Product Configurator). The supported version that is affected is 9.1. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where PeopleSoft Enterprise FIN Product Configurator Brazil executes to compromise PeopleSoft Enterprise FIN Product Configurator Brazil. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of PeopleSoft Enterprise FIN Product Configurator Brazil accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of PeopleSoft Enterprise FIN Product Configurator Brazil. CVSS 3.1 Base Score 4.4 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L).
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Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Oracle PeopleSoft Enterprise FIN Product Configurator Brazil component, specifically affecting version 9.1 of the application suite. This security flaw is classified as an easily exploitable issue that requires a low-privileged attacker to have valid logon credentials and network access to the infrastructure hosting the PeopleSoft environment. The nature of this vulnerability allows for unauthorized modifications to data integrity and availability within the system, representing a significant risk to organizations relying on accurate financial configuration data.
From a technical perspective, the flaw enables an authenticated user with minimal privileges to perform unauthorized update, insert, or delete operations against accessible data stores managed by the Product Configurator module. This capability bypasses intended access controls, allowing malicious actors to alter critical business records without proper authorization. Additionally, the vulnerability permits actions that can lead to a partial denial of service condition, disrupting normal operational workflows and potentially causing system instability for other users sharing the same infrastructure resources.
The impact assessment aligns with Common Weakness Enumeration standards, particularly highlighting issues related to insufficient access control and potential injection flaws that allow data manipulation. The attack vector is classified as local or adjacent network based on the requirement for logon credentials, which places it in a lower severity category compared to remote unauthenticated exploits but remains critical due to the ease of exploitation once initial access is gained. This scenario reflects common ATT&CK techniques involving account manipulation and resource hijacking, where attackers leverage existing valid accounts to escalate their influence over system data integrity.
The CVSS 3.1 base score of 4.4 indicates a medium severity level, driven by low attack complexity and the requirement for user interaction or simple authentication steps. The vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L) confirms that while confidentiality is not directly impacted, integrity and availability are compromised at a low level. Organizations must recognize that even medium-severity vulnerabilities can lead to significant operational disruptions or data corruption if left unpatched, especially in financial modules where accuracy is paramount for regulatory compliance and business continuity.
Mitigation strategies should prioritize the immediate application of vendor-provided security patches or updates released by Oracle for PeopleSoft Enterprise FIN Product Configurator Brazil version 9.1. In cases where patching is not immediately feasible, implementing strict network segmentation to limit access to the affected infrastructure from untrusted zones can reduce the attack surface. Additionally, enforcing multi-factor authentication and monitoring user activity logs for anomalous data modification patterns can help detect potential exploitation attempts early. Regular audits of privileged accounts and adherence to the principle of least privilege are essential preventive measures to minimize the risk associated with this vulnerability.