CVE-2026-91238
Summary
by MITRE • 10/21/2026
Vulnerability in the Oracle SOA Suite product of Oracle Fusion Middleware (component: Fabric Layer). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle SOA Suite. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle SOA Suite accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle SOA Suite. CVSS 3.1 Base Score 7.1 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L).
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Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Fabric Layer of Oracle SOA Suite, a critical component of Oracle Fusion Middleware that facilitates service-oriented architecture integration and orchestration. This security flaw affects specific supported versions including 12.2.1.4.0 and 14.1.2.0.0, indicating that even recently maintained releases are susceptible to exploitation. The nature of this vulnerability allows for remote compromise by an attacker who possesses only low-level privileges within the network environment. Unlike high-privilege exploits that require administrative access or complex authentication bypasses, this flaw can be leveraged by users with minimal initial access rights, significantly lowering the barrier to entry for malicious actors targeting enterprise middleware infrastructure.
The attack vector is primarily network-based and operates over HTTP, which suggests that the vulnerability may involve improper validation of input data sent through standard web protocols used in SOA communications. An attacker with local or low-privileged network access can exploit this flaw without requiring user interaction, as indicated by the User Interface (UI) parameter being set to None in the CVSS vector. This characteristic makes the vulnerability particularly dangerous in automated attack scenarios where no social engineering or physical presence is required. The ability to execute such attacks over HTTP also implies that if traffic is not strictly monitored or encrypted with additional integrity checks, the exploitation can occur seamlessly within normal network operations, blending in with legitimate service requests.
Successful exploitation of this vulnerability leads to severe consequences regarding data integrity and system availability. Specifically, attackers gain unauthorized capabilities to create, delete, or modify critical data stored within Oracle SOA Suite as well as all other accessible data linked through its services. This level of access aligns closely with CWE-798, which describes the use of hardcoded credentials or weak authentication mechanisms that allow privilege escalation, although in this context it manifests more broadly as unauthorized data manipulation due to insufficient authorization checks on specific API endpoints or service calls. The integrity impact is rated high because an attacker can alter business logic outcomes by modifying underlying data structures, potentially leading to financial loss, regulatory non-compliance, or reputational damage depending on the nature of the processed transactions.
In addition to compromising data integrity, the vulnerability enables a partial denial of service against Oracle SOA Suite services. This availability impact means that attackers can disrupt critical business processes by exhausting system resources or causing service failures through malformed requests. While not necessarily resulting in a complete shutdown of all systems, this partial disruption can halt specific workflows, delay transaction processing, and degrade overall performance for end-users relying on these integrated services. The combination of high integrity impact and low availability impact results in a CVSS 3.1 Base Score of 7.1, classifying it as a High severity issue that demands immediate attention from security operations teams responsible for middleware governance.
From an offensive security perspective, this vulnerability maps to MITRE ATT&CK techniques involving unauthorized access and potential persistence mechanisms if the attacker modifies configuration files or service definitions to maintain long-term control. It also relates to CWE-284 Improper Access Control, where the application fails to properly verify that a user has sufficient permissions before allowing actions on sensitive resources. The exploitation likely involves crafting specific HTTP requests that bypass internal authorization logic within the Fabric Layer, exploiting gaps in how role-based access controls are enforced for certain administrative or data-modifying functions exposed via web services.
Mitigation strategies must focus on immediate patching and network segmentation until updates can be applied. Oracle has released patches addressing this flaw, so applying the latest security update to all affected versions is the primary remediation step. In environments where patching cannot occur immediately due to operational constraints, implementing strict access controls at the firewall or load balancer level is recommended. This includes restricting HTTP traffic destined for SOA Suite endpoints to only known and trusted IP addresses, thereby limiting exposure to low-privileged attackers who might otherwise gain network proximity. Additionally, enabling comprehensive logging and monitoring of all requests made to the Fabric Layer can help detect anomalous patterns indicative of exploitation attempts, such as unusual spikes in data modification events or repeated failed authorization checks that precede successful attacks. Regular audits of user privileges should also be conducted to ensure no unnecessary low-privileged accounts have access to sensitive middleware components.