CVE-2026-91353 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. While the vulnerability is in Oracle Outside In Technology, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Outside In Technology accessible data. CVSS 3.1 Base Score 8.6 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N).
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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 Oracle Fusion Middleware version 8.5.8, represents a critical security flaw that allows for unauthorized access to sensitive data without requiring authentication. This defect is classified as an easily exploitable issue where an unauthenticated attacker can leverage network access via HTTP to compromise the integrity and confidentiality of the system. The technical nature of this vulnerability aligns with CWE-20 Improper Input Validation, indicating that the software fails to adequately sanitize or validate input data before processing it through the Clean Content SDK. This lack of rigorous validation permits malicious actors to inject crafted requests that trigger unintended behavior within the application logic, leading to a breach in security controls.
The operational impact of this vulnerability is severe due to its high confidentiality score and significant scope change characteristics. Although the flaw resides specifically within Oracle Outside In Technology, successful exploitation can lead to broader consequences affecting additional products integrated with or dependent on this middleware component. This scope expansion means that an attacker does not need direct access to every affected system; compromising one entry point via HTTP can cascade into unauthorized access across multiple connected services. The primary consequence is the exposure of critical data, allowing attackers to read sensitive information such as user credentials, proprietary business documents, or personal identifiable information stored within the Oracle environment. This aligns with ATT&CK technique T1005 Data from Local System, where adversaries seek to exfiltrate data directly from compromised systems without triggering immediate detection mechanisms associated with more aggressive intrusion methods.
The CVSS 3.1 vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N) highlights that the attack requires no user interaction, has low complexity, and originates from a network location, making it highly attractive to automated scanning tools and opportunistic attackers. The scope change indicator confirms that the vulnerability affects resources beyond the vulnerable component itself, amplifying the risk profile significantly. While integrity and availability impacts are currently listed as none in this specific vector assessment, the potential for lateral movement or further exploitation based on accessed data remains a substantial secondary threat. Organizations relying on Oracle Fusion Middleware must recognize that even if their primary concern is not immediate system disruption, the loss of confidentiality poses a long-term risk including regulatory penalties under frameworks like GDPR or HIPAA and reputational damage from public disclosure of breached sensitive records.
Mitigation strategies should focus primarily on patching to the latest secure version of Oracle Outside In Technology as soon as possible after verification by security teams. Until patches are applied, network-level controls such as Web Application Firewalls can be configured to inspect HTTP traffic for patterns indicative of exploitation attempts targeting input validation flaws in the Clean Content SDK. Additionally, restricting access to the affected services via IP whitelisting or virtual private networks reduces the attack surface available to unauthenticated remote attackers. It is also advisable to implement strict logging and monitoring solutions that alert on unusual data retrieval volumes or anomalous HTTP request structures directed at Oracle Fusion Middleware endpoints. Regular vulnerability assessments and penetration testing should be conducted to identify similar input validation weaknesses in other components of the middleware stack, ensuring a holistic approach to securing the environment against both known and emerging threats related to improper input handling.