CVE-2026-91251 in SOA Suite
Summary
by MITRE • 10/21/2026
Vulnerability in the Oracle SOA Suite product of Oracle Fusion Middleware (component: Adapters). 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. While the vulnerability is in Oracle SOA Suite, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle SOA Suite. 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 • 10/21/2026
The identified vulnerability resides within the Adapters component of Oracle SOA Suite, a critical part of Oracle Fusion Middleware that facilitates integration between disparate systems and applications. This security flaw affects specific supported versions including 12.2.1.4.0 and 14.1.2.0.0, representing significant risk to organizations relying on these platforms for enterprise service bus operations and business process orchestration. The nature of this vulnerability is particularly severe because it allows an attacker with low privileges and network access via HTTP to compromise the underlying system. This indicates that authentication requirements are either insufficient or can be bypassed through specific request manipulation, enabling unauthorized entities to interact directly with sensitive adapter functionalities without needing elevated credentials initially.
The technical flaw likely involves improper validation of input data or insecure handling of requests within the SOAP-based adapters, which are commonly used for web service interactions in SOA environments. By exploiting this weakness, an attacker can execute arbitrary commands or manipulate system states effectively achieving a complete takeover of the Oracle SOA Suite instance. This level of compromise is consistent with vulnerabilities classified under CWE-20 Improper Input Validation or CWE-74 Injection, where untrusted data is processed without adequate sanitization. The ability to escalate privileges from low-level network access to full administrative control highlights a critical failure in security boundaries and privilege separation within the application architecture.
The operational impact of this vulnerability is profound due to its high availability score and broad scope. With a CVSS 3.1 Base Score of 9.9, categorized as Critical severity, the risk extends beyond mere data theft or service disruption. The vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H) reveals that while the attack requires low privileges and has low complexity, it exhibits a scope change where the vulnerability in SOA Suite impacts additional products within the broader Oracle ecosystem. This means that compromising the middleware layer can lead to lateral movement across integrated systems, potentially exposing backend databases, ERP modules, or other connected services to unauthorized access. The high impact on confidentiality, integrity, and availability suggests that attackers could exfiltrate sensitive business data, alter critical transaction records, or render essential integration services unavailable causing significant operational downtime.
From a threat intelligence perspective, this vulnerability aligns with ATT&CK techniques related to Initial Access via Web Services and Privilege Escalation within the Enterprise Network context. Attackers can leverage standard HTTP protocols which are often permitted through firewalls, making detection difficult without specialized monitoring tools that inspect SOAP payloads for anomalous patterns or injection attempts. The lack of user interaction requirement further simplifies exploitation, allowing for automated attacks against exposed endpoints. Organizations must recognize that this is not an isolated issue but a systemic risk affecting the integrity of their entire integration landscape due to the interconnected nature of SOA architectures.
Mitigation strategies should prioritize immediate patching by applying the latest security updates provided by Oracle for versions 12.2.1.4.0 and 14.1.2.0.0 if available, or upgrading to a fully supported version that addresses these specific adapter flaws. In cases where patching is not immediately feasible, network segmentation should be enforced to restrict HTTP access to the SOA Suite adapters from untrusted networks. Implementing strict input validation at the perimeter using Web Application Firewalls can help block malicious payloads targeting known vulnerable endpoints. Additionally, enforcing strong authentication mechanisms and least-privilege principles for service accounts interacting with these adapters reduces the attack surface. Continuous monitoring of SOAP traffic for unusual patterns or unauthorized access attempts is essential to detect exploitation in real-time and respond before significant damage occurs.