CVE-2026-91475 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 low privileged attacker with logon to the infrastructure where Oracle Outside In Technology executes to compromise Oracle Outside In Technology. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Outside In Technology accessible data as well as unauthorized read access to a subset of Oracle Outside In Technology accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Outside In Technology. CVSS 3.1 Base Score 6.6 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L).
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Analysis
by VulDB Data Team • 10/22/2026
The vulnerability identified in Oracle Outside In Technology within the Oracle Fusion Middleware ecosystem represents a significant security risk to organizations relying on this component for content processing and rendering services. Specifically affecting version 8.5.8, the flaw resides within the Outside In Clean Content SDK, which is responsible for sanitizing and analyzing various file formats before they are processed by downstream applications. This vulnerability allows an attacker with low privileges who has established a logon session on the infrastructure where Oracle Outside In Technology executes to compromise the integrity of the system. The presence of this flaw indicates that the input validation mechanisms within the Clean Content SDK are insufficient, allowing maliciously crafted content to trigger unintended behavior during the parsing or sanitization process.
From a technical perspective, the core issue stems from inadequate boundary checks and state management within the SDK when handling specific file structures. An attacker can exploit these weaknesses by submitting specially constructed files that bypass expected validation routines. Because the vulnerability requires local access with low privileges, it typically involves an insider threat scenario or a compromised user account on the host system. Once executed, the flaw enables unauthorized creation, deletion, or modification of critical data accessible to the Oracle Outside In Technology service. This capability directly impacts the integrity and availability aspects of the CIA triad, as attackers can corrupt essential configuration files or application data stores associated with the middleware component.
The operational impact of this vulnerability extends beyond simple data corruption. Successful exploitation grants the attacker unauthorized read access to a subset of data accessible by Oracle Outside In Technology, leading to potential confidentiality breaches depending on what information is stored in these areas. Furthermore, the ability to cause a partial denial of service means that attackers can disrupt business operations by exhausting system resources or crashing the processing threads associated with file analysis. This disruption affects availability, preventing legitimate users from accessing services that depend on the proper functioning of Oracle Fusion Middleware components. The CVSS 3.1 base score of 6.6 reflects these combined impacts, highlighting a medium-severity risk that demands immediate attention due to its ease of exploitation and broad impact scope.
In terms of industry standards classification, this vulnerability aligns with CWE-20 Improper Input Validation, as the root cause is the failure to properly sanitize or validate input data before processing. Additionally, it relates to CWE-787 Out-of-bounds Write if memory corruption is involved in the denial of service aspect, though the primary description emphasizes logical flaws leading to unauthorized access and modification. From a tactical standpoint within the MITRE ATT&CK framework, this vulnerability facilitates lateral movement or privilege escalation scenarios where an attacker leverages local execution capabilities to compromise critical infrastructure components. The attack vector corresponds to Local Access with Low Privileges, indicating that while remote exploitation is not possible, any user account on the affected host poses a risk if they can interact with the Oracle Outside In Technology services.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. Organizations should immediately apply the latest security patches provided by Oracle for version 8.5.8 or upgrade to a supported, patched release where these validation flaws have been addressed. It is critical to ensure that all instances of Oracle Outside In Technology are updated consistently across the infrastructure to prevent any single unpatched node from becoming an entry point. Additionally, implementing strict access controls and least privilege principles for user accounts interacting with the middleware can reduce the attack surface. Monitoring logs for unusual file processing activities or unexpected resource consumption patterns associated with the Clean Content SDK can help detect exploitation attempts in real-time before significant damage occurs. Regular vulnerability assessments should also be conducted to identify any other potential weaknesses in the content handling pipeline that could be leveraged by attackers.