CVE-2026-91248 in WebCenter Portal
Summary
by MITRE • 10/21/2026
Vulnerability in the Oracle WebCenter Portal product of Oracle Fusion Middleware (component: Runtime Tools). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle WebCenter Portal. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle WebCenter Portal accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/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 Runtime Tools component of Oracle WebCenter Portal, a key element of the Oracle Fusion Middleware suite. This security flaw affects specific supported versions, namely 12.2.1.4.0 and 14.1.2.0.0, indicating that even currently maintained software releases are susceptible to this issue. The nature of the vulnerability is characterized by its ease of exploitation, allowing an unauthenticated attacker who possesses network access via HTTP to successfully compromise the integrity and confidentiality of the target system. This classification highlights a significant gap in authentication mechanisms or input validation within the web application layer, enabling remote actors to interact with sensitive backend processes without prior credential verification.
From a technical perspective, the flaw facilitates unauthorized read access to a subset of data accessible through Oracle WebCenter Portal. While the impact is currently limited to confidentiality rather than integrity or availability, the ability for an external actor to retrieve internal information poses substantial risks depending on the sensitivity of that data. The vulnerability aligns with CWE-284, which describes Improper Access Control, specifically where access control decisions are not properly enforced before granting access to resources. Furthermore, in terms of offensive security frameworks such as MITRE ATT&CK, this behavior corresponds to techniques involving unauthorized collection or exfiltration of information from remote systems via network protocols like HTTP, often categorized under Initial Access or Discovery phases depending on the specific exploitation vector used by an adversary.
The operational impact of this vulnerability is primarily centered around data leakage and potential privacy violations. Although the CVSS 3.1 Base Score is rated at 5.3 with a Medium severity level due to its focus solely on Confidentiality impacts, the implications for organizations can be severe if the exposed subset contains personally identifiable information, proprietary business logic, or configuration details that could aid in further attacks. The absence of required authentication means that automated scanning tools and opportunistic attackers can exploit this flaw at scale without needing to bypass complex security controls first. This lowers the barrier to entry significantly, increasing the likelihood of successful exploitation across a wide range of internet-facing deployments.
To mitigate this risk, organizations running affected versions must prioritize applying the latest available patches or updates provided by Oracle for their specific WebCenter Portal version. Since the vulnerability is exploitable via HTTP over the network, ensuring that only necessary ports are exposed to untrusted networks and implementing strict firewall rules can reduce the attack surface temporarily until patching occurs. Additionally, deploying a Web Application Firewall may help in detecting and blocking exploit attempts based on known signatures or anomalous behavior patterns associated with this specific flaw. Regular security assessments and penetration testing should be conducted to verify that access controls are functioning as intended and that no other similar misconfigurations exist within the middleware environment.