CVE-2026-91350 in Outside In Technology
Summary
by MITRE • 10/21/2026
Vulnerability in the Oracle Outside In Technology product of Oracle Fusion Middleware (component: Outside In Clean Content SDK). The supported version that is affected is 8.5.8. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Outside In Technology. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Outside In Technology. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified in Oracle Outside In Technology, specifically within the Clean Content SDK component of version 8.5.8, represents a significant risk to system availability due to its potential for causing complete denial of service conditions. This flaw is classified under CWE-400, which denotes uncontrolled resource consumption, and aligns with MITRE ATT&CK technique T1499, Endpoint Denial of Service. The core technical issue stems from how the SDK processes incoming content via HTTP requests without adequate validation or bounds checking on specific input parameters. When an attacker sends a specially crafted request containing malformed or excessively large data structures, the underlying processing logic fails to handle the anomaly gracefully. Instead of rejecting the invalid input with an appropriate error code, the application enters an infinite loop or consumes excessive memory and CPU resources while attempting to parse the malicious payload. This behavior leads directly to a hang state where the service becomes unresponsive, effectively resulting in a complete denial of service for any users relying on that instance of Oracle Outside In Technology.
The operational impact of this vulnerability is severe because it requires no authentication and can be exploited remotely over standard HTTP networks. An attacker with network access to the target system can trigger this condition simply by sending a single crafted request, making automated exploitation straightforward and scalable across multiple targets if exposed on the public internet. The CVSS 3.1 base score of 7.5 reflects high severity primarily due to the availability impact, as confirmed by the vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. While confidentiality and integrity remain unaffected in this specific scenario, the loss of service can disrupt downstream applications that depend on Oracle Fusion Middleware for content processing tasks such as document previewing or file conversion services commonly found in enterprise environments.
Mitigation strategies should focus on immediate patching to the latest supported version where these input validation checks have been hardened by Oracle engineering teams. In cases where patching is not immediately feasible, network-level controls are critical. Implementing web application firewalls with rules designed to detect and block anomalous HTTP request sizes or specific patterns associated with buffer overflow attempts can provide a layer of defense against exploitation. Additionally, restricting access to the Outside In Technology endpoints through strict firewall rules ensures that only authorized internal services can interact with the API, thereby reducing the attack surface available to unauthenticated external actors. Regular monitoring for unusual spikes in CPU usage or memory consumption on servers hosting this component can also serve as an early detection mechanism for ongoing exploitation attempts.