CVE-2026-91497 in PeopleSoft Enterprise PeopleTools
Summary
by MITRE • 10/21/2026
Vulnerability in the PeopleSoft Enterprise PeopleTools product of Oracle PeopleSoft (component: Updates Environment Mgmt). Supported versions that are affected are 8.61-8.63. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise PeopleSoft Enterprise PeopleTools. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of PeopleSoft Enterprise PeopleTools accessible data. CVSS 3.1 Base Score 5.3 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N).
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Updates Environment Management component of Oracle PeopleSoft Enterprise PeopleTools, specifically affecting versions ranging from 8.61 through 8.63. This security flaw represents a critical weakness in how the application handles data modification requests originating from network-based interactions. The core technical issue involves an insufficient validation mechanism for input parameters or session states during update operations managed by this component. Because the vulnerability is classified as easily exploitable, it indicates that the logic error does not require complex manipulation of state variables or specific user actions to trigger. An attacker can leverage standard HTTP requests to interact with the vulnerable endpoints directly, bypassing any necessary authentication checks due to a failure in enforcing access control policies at the application layer. This lack of proper authorization verification allows unauthenticated actors to execute commands that should be restricted to privileged users or authenticated sessions.
From an operational perspective, the impact of this vulnerability is centered on data integrity rather than confidentiality or availability. The CVSS 3.1 base score of 5.3 reflects a medium severity level driven primarily by integrity impacts. Successful exploitation enables unauthorized updates, inserts, or deletes against accessible data within PeopleSoft Enterprise PeopleTools. This means that an attacker could alter configuration settings, modify user permissions, corrupt audit logs, or inject malicious records into the database backend associated with these tools. Such actions can lead to significant business disruption, including incorrect reporting, compromised system configurations, and potential lateral movement if the altered data influences other integrated systems. The ability to perform write operations without authentication undermines the fundamental trust model of the enterprise application, allowing for persistent backdoors or denial-of-service conditions through data corruption.
In terms of industry standard classifications, this vulnerability aligns with CWE-269 Improper Privilege Management and CWE-862 Missing Authorization. These categories highlight the failure to enforce proper access controls on sensitive functions within the Updates Environment Mgmt module. Furthermore, from a tactical perspective relevant to threat intelligence frameworks like MITRE ATT&CK, this behavior corresponds to techniques involving Account Manipulation or Data Injection via web application attacks. Attackers may utilize these capabilities to establish persistence by modifying system configurations or to escalate privileges indirectly by altering user roles and permissions stored within the PeopleTools database. The network-based nature of the attack vector means that remote exploitation is feasible without physical access or prior compromise of a local endpoint, increasing the risk surface significantly in internet-facing deployments.
Mitigation strategies must focus on immediate patching and enhanced monitoring until updates are applied. Organizations running affected versions should prioritize applying the latest security patches provided by Oracle for PeopleTools 8.61 through 8.63 to address the underlying code flaws responsible for this authorization bypass. In environments where patching is not immediately feasible, network-level controls such as Web Application Firewalls can be configured to detect and block anomalous HTTP requests targeting the vulnerable endpoints, particularly those exhibiting patterns of unauthorized data modification attempts. Additionally, implementing strict input validation on all client-facing interfaces and enforcing multi-factor authentication for administrative functions can reduce the likelihood of successful exploitation. Regular audits of access logs should also be conducted to identify any signs of attempted or completed unauthorized modifications, ensuring that potential breaches are detected early in their lifecycle.