CVE-2026-91261 in WebCenter Content
Summary
by MITRE • 10/21/2026
Vulnerability in the Oracle WebCenter Content product of Oracle Fusion Middleware (component: Content Server). The supported version that is affected is 14.1.2.0.0. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle WebCenter Content. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle WebCenter Content accessible data. CVSS 3.1 Base Score 3.1 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N).
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Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Content Server component of Oracle WebCenter Content, specifically affecting version 14.1.2.0.0 which is part of the broader Oracle Fusion Middleware suite. This software serves as a critical enterprise content management solution, handling the storage, retrieval, and distribution of digital assets across organizational networks. The flaw represents an authorization bypass mechanism that allows for unauthorized data access, undermining the fundamental security principle of least privilege within the application's architecture.
From a technical perspective, the vulnerability is characterized by its difficulty to exploit, indicated by a high attack complexity in the CVSS scoring model. This suggests that while the underlying logic error exists, triggering it requires specific conditions or precise sequencing that are not trivial for an automated scanner to detect without deep contextual understanding. The flaw permits low-privileged attackers who already possess valid network access via HTTP to manipulate request parameters or session states in a way that circumvents intended access controls. This indicates a failure in server-side validation of user permissions relative to the requested resource, allowing data retrieval operations that should be restricted based on the attacker's role level.
The operational impact is primarily confined to confidentiality, as evidenced by the CVSS 3.1 base score of 3.1 and the vector indicating no impact on integrity or availability. Successful exploitation results in unauthorized read access to a subset of accessible data within Oracle WebCenter Content. While this does not allow for system compromise or service disruption, it poses significant risks related to data leakage. Depending on the sensitivity of the documents stored in the content server, such as proprietary intellectual property, customer records, or internal communications, even partial exposure can lead to regulatory non-compliance and reputational damage. The limitation to a subset of data suggests that not all system resources are equally exposed, but any accessible sensitive information is at risk.
In terms of industry standard classifications, this vulnerability aligns with CWE-269 Improper Privilege Management or potentially CWE-862 Missing Authorization, as the core issue involves an actor performing actions beyond their authorized level. From a tactical standpoint within the MITRE ATT&CK framework, this behavior corresponds to techniques associated with Discovery and Collection phases, specifically where an attacker leverages existing access to gather information about resources on the system or network. The use of HTTP for exploitation places it in the context of web-based attacks, highlighting risks inherent in internet-facing applications that do not enforce strict role-based access controls at every endpoint.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. Oracle has likely released a patch addressing this specific logic flaw; therefore, applying the latest security updates for version 14.1.2.0.0 is the primary corrective action. Organizations should verify that their deployment of WebCenter Content is fully patched to the most recent supported release. Additionally, implementing network-level controls such as web application firewalls can help detect and block anomalous request patterns associated with exploitation attempts. It is also advisable to review access control policies within the content server to ensure that data sensitivity labels are correctly mapped to user roles, minimizing the blast radius in case of future vulnerabilities. Regular security audits focusing on authentication and authorization logic will further reduce the risk surface for similar privilege escalation or bypass issues.