CVE-2026-83038 in WebLogic Server
Summary
by MITRE • 09/16/2026
Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component: TopLink Integration). Supported versions that are affected are 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle WebLogic Server. While the vulnerability is in Oracle WebLogic Server, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle WebLogic Server. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/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 TopLink Integration component of Oracle WebLogic Server, a critical middleware platform used for building and deploying enterprise applications across various industries. This specific flaw affects multiple supported versions including 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, and 15.1.1.0.0, indicating a systemic issue within the integration layer rather than an isolated incident in a single release branch. The vulnerability is characterized by its high severity, with a CVSS 3.1 base score of 9.9, which signifies critical risk to organizational infrastructure. This scoring reflects that the flaw allows for complete compromise of confidentiality, integrity, and availability when successfully exploited.
From a technical perspective, the core issue stems from an easily exploitable vulnerability accessible via HTTP protocol interactions. Unlike many complex enterprise vulnerabilities that require intricate chaining or specific local conditions, this defect can be triggered by low-privileged attackers who possess network access to the target system. The attack vector is classified as Network with Low Attack Complexity and requires no user interaction, making it particularly dangerous in automated scanning environments where malicious actors routinely probe for exposed services. The simplicity of exploitation lowers the barrier to entry significantly, allowing even less sophisticated threat actors to achieve high-level impact against vulnerable instances.
The operational impact of this vulnerability extends beyond the immediate compromise of Oracle WebLogic Server itself due to a scope change phenomenon inherent in middleware architectures. While the direct target is the application server, successful exploitation can lead to lateral movement and takeover of additional products connected to or hosted on the same infrastructure. This cascading effect means that an attacker gaining control over WebLogic may subsequently access databases, backend services, or other integrated applications, effectively neutralizing perimeter defenses and internal segmentation strategies designed to protect these assets.
In terms of industry standard classification, this vulnerability aligns with CWE-20 Improper Input Validation if the root cause involves malformed data processing within TopLink, or potentially CWE-78 OS Command Injection if the exploitation leads to arbitrary command execution on the underlying operating system. From a tactical standpoint as defined by MITRE ATT&CK, this falls under Initial Access via Network Service Exploitation and could facilitate Privilege Escalation depending on how the server processes elevated requests post-exploitation. The high availability impact suggests that successful attacks may also involve Denial of Service conditions or data destruction, further compounding the business risk associated with unpatched systems.
Mitigation strategies must prioritize immediate patching to the latest available version provided by Oracle for each affected product line. Organizations should implement strict network segmentation policies to restrict HTTP access to WebLogic servers from untrusted networks and enforce strong authentication mechanisms even if internal trust models are assumed. Additionally, deploying web application firewalls with rulesets tuned to detect exploitation patterns associated with TopLink integration flaws can provide a layer of defense in depth while patching efforts are underway. Continuous monitoring for anomalous network traffic originating from low-privileged accounts attempting HTTP interactions should be established to detect potential probing or active exploitation attempts before full system compromise occurs.