CVE-2026-91459 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 Image Export SDK). The supported version that is affected is 8.5.8. Easily exploitable vulnerability allows unauthenticated attacker with logon to the infrastructure where Oracle Outside In Technology executes to compromise Oracle Outside In Technology. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in takeover of Oracle Outside In Technology. CVSS 3.1 Base Score 7.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 10/21/2026
The Oracle Outside In Technology product within the Oracle Fusion Middleware suite contains a critical security flaw in its Image Export SDK component, specifically affecting version 8.5.8 and potentially earlier versions depending on deployment configurations. This vulnerability represents a significant risk to organizations relying on this middleware for document processing and image manipulation tasks. The core issue lies in how the software handles specific input data during the export process, allowing an attacker who has gained access to the infrastructure where Oracle Outside In Technology executes to compromise the system. While the initial vector requires local network or physical access rather than remote exploitation over the internet, the severity of the consequences elevates it to a high-risk classification due to the potential for complete system takeover.
From a technical perspective, this vulnerability is characterized by an easily exploitable flaw that does not require complex payload construction or sophisticated bypass techniques. The attacker must first establish logon access to the infrastructure hosting the vulnerable component, which serves as the initial foothold in the attack chain. Once authenticated at the operating system level, the attacker can trigger the malformed input condition within the Image Export SDK. This triggers a memory corruption error, likely involving buffer overflow or heap exploitation mechanisms common in C-based image processing libraries that handle untrusted data without sufficient bounds checking. The requirement for human interaction suggests that the exploit may involve social engineering tactics to get an authorized user to open a specially crafted file or execute a specific action within an application integrated with Oracle Outside In Technology, thereby activating the vulnerable code path.
The operational impact of this vulnerability is severe, as indicated by its CVSS 3.1 Base Score of 7.8. The vector string (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) highlights that while the attack requires local access and user interaction, it results in high impacts across confidentiality, integrity, and availability. A successful exploitation allows an unauthenticated attacker who has obtained logon credentials to take full control of the Oracle Outside In Technology process. This can lead to arbitrary code execution with the privileges of the service account running the middleware. Consequently, attackers could exfiltrate sensitive data stored or processed by the application, modify critical system configurations, install persistent backdoors, or disrupt services leading to denial of conditions for business operations dependent on document processing capabilities.
This vulnerability aligns closely with CWE-120 Buffer Copy without Checking Size of Input and potentially CWE-78 Improper Neutralization of Special Elements used in an OS Command if the execution leads to shell commands being invoked. In terms of offensive security frameworks, this scenario maps to MITRE ATT&CK techniques such as T1059 Command and Scripting Interpreter for executing arbitrary code after exploitation, and T1068 Exploitation for Privilege Escalation if the service account has elevated permissions. The requirement for user interaction places it within the context of social engineering vectors often seen in targeted attacks where adversaries craft malicious documents to trick users into triggering remote code execution or local privilege escalation paths.
Mitigation strategies must focus on both immediate remediation and long-term architectural hardening. Oracle should be consulted immediately for available patches or updates that address this specific flaw in version 8.5.8. Organizations running vulnerable versions must apply these security fixes as a priority to close the exploitation window. In addition to patching, implementing strict input validation at application boundaries is crucial to prevent malformed data from reaching the underlying SDK components. Network segmentation should be enforced to limit local access to servers hosting Oracle Fusion Middleware components, ensuring that only authorized administrators and specific service accounts can interact with these systems. Furthermore, deploying endpoint detection and response solutions capable of identifying anomalous process behavior associated with memory corruption exploits can provide an additional layer of defense against successful exploitation attempts even if the vulnerability is present in the environment.