CVE-2026-83107 in Forms
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle Forms product of Oracle Fusion Middleware (component: Forms Services, C/S, Charmode). Supported versions that are affected are 12.2.1.19.0 and 14.1.2.0.0. Easily exploitable vulnerability allows high privileged attacker with network access via HTTP to compromise Oracle Forms. While the vulnerability is in Oracle Forms, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle Forms. CVSS 3.1 Base Score 9.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Forms Services component of Oracle Fusion Middleware, specifically affecting versions 12.2.1.19.0 and 14.1.2.0.0 when operating in Client/Server mode with Charmode enabled. This security flaw is classified as a high-severity issue due to its potential for remote exploitation by authenticated attackers who possess network access via the HTTP protocol. The vulnerability allows an attacker with high privileges to compromise the integrity and availability of the Oracle Forms application, leading to a complete takeover of the service. Although the technical root cause is located within the Oracle Forms module, the operational impact extends beyond this specific component due to scope change characteristics inherent in the architecture. This means that compromising Oracle Forms can lead to broader system instability or unauthorized access across interconnected products within the Fusion Middleware ecosystem, thereby amplifying the risk profile significantly compared to isolated application flaws.
From a technical perspective, the vulnerability exploits weaknesses in how the server handles requests under specific configuration states involving Charmode and Client/Server interactions. The ability for an attacker with high privileges to exploit this flaw via HTTP indicates that the authentication barrier is not sufficient to prevent exploitation once network access is established. This aligns with Common Weakness Enumeration (CWE) categories related to improper input validation or insecure direct object references, where the application fails to properly verify user permissions before executing sensitive operations. The CVSS 3.1 base score of 9.1 reflects a Critical severity rating, driven by high impacts on Confidentiality, Integrity, and Availability. The vector string (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H) confirms that while the attack requires High Privileges initially, it involves Low Attack Complexity, no user interaction, and a Changed Scope, which collectively result in severe consequences for all three security pillars.
In terms of operational impact, successful exploitation allows an attacker to gain full control over Oracle Forms services. This level of access can be leveraged to exfiltrate sensitive data stored within the forms environment, modify application logic or configurations to maintain persistence, and disrupt service availability by crashing processes or consuming excessive resources. The scope change aspect implies that this compromise could serve as a pivot point for further lateral movement within the organization's network infrastructure. Attackers may utilize the compromised Oracle Forms instance to access backend databases, internal APIs, or other middleware components that trust the forms server implicitly. This scenario is consistent with ATT&CK techniques involving Initial Access through web applications and subsequent Privilege Escalation if additional misconfigurations exist, as well as Impact tactics such as Data Exfiltration and Service Disruption.
Mitigation strategies must prioritize immediate patching of Oracle Fusion Middleware to a version that addresses this specific flaw in the Forms Services component. Organizations should verify their current deployment versions against the supported list provided by Oracle and apply the latest security patches or interim fixes released for versions 12.2.1.19.0 and 14.1.2.0.0. In addition to patching, it is critical to review network segmentation policies to ensure that HTTP access to Forms Services is restricted to authorized IP ranges only. Implementing strict firewall rules and Web Application Firewalls (WAF) can help mitigate exploitation attempts by filtering malicious payloads before they reach the application layer. Furthermore, administrators should audit user privileges within Oracle Fusion Middleware to ensure that high-privilege accounts are strictly controlled and monitored for anomalous activity. Regular vulnerability assessments and penetration testing focused on middleware components will help identify similar weaknesses in other parts of the infrastructure, ensuring a more resilient security posture against evolving threats targeting enterprise application servers.