CVE-2026-83102 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. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Forms. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Forms accessible data as well as unauthorized access to critical data or complete access to all Oracle Forms accessible data. CVSS 3.1 Base Score 7.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Oracle Forms product, specifically affecting the Forms Services component in client/server mode with Charmode enabled for supported versions 12.2.1.19.0 and 14.1.2.0.0 of Oracle Fusion Middleware. This security flaw allows an unauthenticated attacker to compromise the integrity and confidentiality of data accessible through Oracle Forms by exploiting a difficult-to-exploit vulnerability over HTTP network connections. The presence of this issue indicates a significant weakness in how the application handles specific input sequences or state transitions within the Charmode environment, which is designed to manage character encoding and display logic for legacy applications.
From a technical perspective, the core flaw likely stems from improper validation or sanitization mechanisms when processing user-supplied data that interacts with the underlying form rendering engine. Although the attack complexity is rated as high, meaning specific conditions must be met to trigger the exploit successfully, the lack of required authentication presents a severe risk for any publicly accessible or internally exposed Oracle Forms instances. The attacker can leverage this weakness to manipulate critical application logic, leading to unauthorized creation, deletion, or modification of data that should remain immutable under normal operational circumstances. This aligns with CWE-20 Improper Input Validation and potentially CWE-79 Cross-site Scripting if the vulnerability involves injection into rendered content, though the primary impact described points toward broader integrity violations within the application layer rather than just client-side script execution.
The operational impact of this vulnerability is substantial due to its high confidentiality and integrity scores in the CVSS 3.1 scoring system. A successful exploitation results in complete access to all Oracle Forms accessible data, allowing an adversary to exfiltrate sensitive information or alter records without detection by standard authentication controls. This effectively bypasses the intended security boundaries of the middleware layer, granting the attacker privileges equivalent to a legitimate user with elevated rights. The ability to modify critical data undermines the trustworthiness of business processes dependent on Oracle Forms for transaction processing and record keeping, potentially leading to financial loss, regulatory non-compliance, or operational disruption depending on the nature of the affected applications.
In terms of threat modeling, this vulnerability maps to ATT&CK technique T1059 Command and Scripting Interpreter if the exploitation leads to further system compromise, but more directly it relates to data manipulation tactics such as T1485 Data Destruction or T1078 Valid Accounts if the attacker leverages stolen credentials after initial access. However, since the attack is unauthenticated, it falls under unauthorized access patterns where the adversary exploits a flaw in the application's logic rather than stealing valid credentials initially. The high complexity of exploitation suggests that automated scanning tools may not easily detect this issue, requiring manual testing or advanced fuzzing techniques to identify the specific trigger conditions within the Charmode processing pipeline.
Mitigation strategies must prioritize immediate patching and configuration hardening. Oracle should be updated to a version where this vulnerability is resolved, as these are known affected releases. In cases where patching is not immediately feasible, network-level controls such as Web Application Firewalls can be configured to detect and block anomalous HTTP requests that exhibit patterns consistent with the exploitation of this flaw. Additionally, restricting access to Oracle Forms services to trusted IP ranges or requiring strong authentication mechanisms before reaching the vulnerable component can reduce the attack surface. It is also critical to review Charmode configurations to ensure they are only enabled when strictly necessary for legacy application compatibility, as disabling unnecessary features reduces potential vectors for exploitation. Regular security assessments and penetration testing focused on input validation in form handling components will help identify similar weaknesses before they can be exploited by malicious actors.