CVE-2026-101494 in REST Data Services
Summary
by MITRE • 10/21/2026
Vulnerability in Oracle REST Data Services (component: Core). Supported versions that are affected are 24.2.0-26.2.2. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle REST Data Services. While the vulnerability is in Oracle REST Data Services, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle REST Data Services accessible data. CVSS 3.1 Base Score 7.7 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N).
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Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Core component of Oracle REST Data Services, affecting supported versions ranging from 24.2.0 through 26.2.2. This security flaw represents a significant risk to organizations relying on this middleware for exposing database objects and services via standard HTTP protocols. The nature of the defect allows an attacker with low privileges and network access to exploit the system remotely without requiring user interaction or complex preconditions. Because Oracle REST Data Services often serves as a gateway to underlying enterprise databases, the scope of impact extends beyond the application layer itself. A successful exploitation can lead to a change in security scope, meaning that compromising this single component may provide an attacker with unauthorized access to critical data stored within connected database systems, thereby impacting additional products and services dependent on these data stores.
From a technical perspective, the vulnerability is characterized by its ease of exploitability and low attack complexity. The CVSS 3.1 base score of 7.7 indicates a High severity level, driven primarily by high confidentiality impacts while integrity and availability remain unaffected in this specific vector. The attack vector requires network access via HTTP, suggesting that the flaw likely involves improper validation or authorization checks within the REST API handling logic. An attacker can leverage standard web requests to trigger the vulnerability, bypassing authentication mechanisms intended for lower-privileged users. This aligns with common patterns found in CWE classifications such as Improper Privilege Management or Broken Access Control, where the system fails to enforce appropriate restrictions on authenticated users attempting to access resources beyond their designated permissions. The lack of user interface requirements further simplifies automated exploitation tools, increasing the likelihood of widespread attacks against exposed instances.
The operational impact of this vulnerability is severe due to the potential for complete data exfiltration. Successful attacks result in unauthorized access to critical business data and potentially all Oracle REST Data Services accessible information. This exposure can lead to significant regulatory compliance violations, such as GDPR or HIPAA breaches, depending on the nature of the compromised data. Furthermore, because the vulnerability allows low-privileged attackers to escalate their effective privileges within the application context, it serves as a potential foothold for deeper network intrusion. Attackers may use this access to map internal networks, identify additional vulnerabilities in connected systems, or exfiltrate sensitive intellectual property and customer information. The scope change mentioned in the advisory highlights that the blast radius is not limited to the REST service itself but extends to any downstream data repositories it connects to, amplifying the business risk significantly.
Mitigation strategies must prioritize immediate patching of Oracle REST Data Services to the latest available version within the supported range or higher, as this vulnerability has been addressed in subsequent releases. Organizations should also implement network-level controls such as Web Application Firewalls configured with rulesets specifically designed to detect and block exploitation attempts against known vulnerabilities in Oracle middleware. Additionally, enforcing strict access control policies is critical; administrators should ensure that only necessary ports are exposed to untrusted networks and that strong authentication mechanisms are applied to all REST endpoints. Regular vulnerability scanning and penetration testing focused on API security can help identify misconfigurations or unpatched instances before they are exploited. Monitoring logs for unusual HTTP request patterns, particularly those involving low-privileged accounts accessing sensitive data paths, will aid in early detection of potential compromise attempts aligned with ATT&CK techniques related to Initial Access and Credential Access via Application Layer Protocol.