CVE-2026-83103 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 under the Charmode configuration for client-server connections. This security flaw is characterized by its high severity, with a CVSS 3.1 base score of 9.1, indicating critical risk to confidentiality, integrity, and availability. The vulnerability allows an attacker who possesses network access via HTTP to exploit the defect in Oracle Forms. Although the initial point of compromise is limited to the Oracle Forms application itself, the operational impact extends significantly beyond this boundary due to scope changes inherent in the architecture. Successful exploitation enables a high-privileged attacker with local or network-based privileges to achieve complete takeover of the affected system, thereby compromising the underlying infrastructure and potentially other integrated products within the enterprise environment.
From a technical perspective, the flaw likely stems from insufficient validation or improper handling of input data processed by the Forms Services engine when operating in Charmode. This mode typically facilitates specific client-server interactions that may expose internal APIs or processing routines to external HTTP requests if not properly secured. The requirement for high-privileged access suggests that the attacker must already have authenticated credentials with elevated rights within the Oracle Fusion Middleware environment, which limits the attack surface to insider threats or compromised accounts rather than unauthenticated remote attackers. However, once such privileges are obtained and network connectivity is established via HTTP, the exploitation path becomes straightforward due to low complexity requirements. This aligns with common patterns seen in CWE-20 Improper Input Validation or CWE-74 Injection flaws where trusted inputs are processed without adequate sanitization, leading to arbitrary code execution or privilege escalation within the application context.
The operational impact of this vulnerability is severe, as it directly leads to a complete compromise of Oracle Forms services. An attacker gaining control over these services can manipulate form data, exfiltrate sensitive information stored in associated databases, and alter system configurations. Given that Oracle Fusion Middleware often serves as the backbone for critical business applications, the breach can cascade into broader organizational consequences including financial loss, regulatory non-compliance, and reputational damage. The high availability impact means that denial-of-service conditions could also be induced, disrupting business operations dependent on these forms-based workflows. This scenario is consistent with ATT&CK techniques such as T1078 Valid Accounts for initial access if the attacker leverages stolen credentials, followed by T1059 Command and Scripting Interpreter or T1203 Exploitation for Client Execution to maintain persistence and escalate privileges post-compromise.
Mitigation strategies must focus on both immediate remediation and long-term architectural hardening. The primary defense is applying the latest security patches provided by Oracle, which address the specific code path exploited in this vulnerability. Organizations should ensure that all instances of Oracle Fusion Middleware running versions 12.2.1.19.0 or 14.1.2.0.0 are updated to the most recent patch set available from official support channels. Additionally, network segmentation plays a crucial role in limiting exposure; restricting HTTP access to Forms Services to only trusted internal networks and authenticated users reduces the likelihood of exploitation even if credentials are compromised. Implementing strict input validation at the application layer and enforcing least-privilege principles for administrative accounts can further mitigate risk. Regular audits of user permissions and monitoring for anomalous HTTP traffic patterns targeting Forms endpoints will aid in early detection of potential attack attempts, ensuring that any breach is contained before significant damage occurs to the broader enterprise ecosystem.