CVE-2026-101493 in REST Data Services
Summary
by MITRE • 10/21/2026
Vulnerability in Oracle REST Data Services (component: Core). Supported versions that are affected are 24.2.0-26.2.1. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle REST Data Services. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle REST Data Services accessible data as well as unauthorized read access to a subset of Oracle REST Data Services accessible data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).
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Analysis
by VulDB Data Team • 10/21/2026
Oracle REST Data Services, a component of the broader Oracle database ecosystem, has been identified with a critical security flaw within its Core module affecting versions ranging from 24.2.0 through 26.2.1. This vulnerability represents a significant risk to organizations relying on this middleware for exposing relational data via standard web protocols. The issue stems from an insufficient access control mechanism that fails to properly enforce authorization checks before processing incoming requests. As a result, the system does not adequately verify whether the requesting entity possesses the necessary privileges to perform specific operations on the underlying database objects or metadata structures managed by ORDS. This architectural weakness allows for unauthorized interactions with data resources that should remain restricted to authenticated and authorized users only.
The technical nature of this flaw classifies it as an authorization bypass, specifically falling under CWE-269 Improper Privilege Management within standard vulnerability classification schemas. The exploitability profile indicates a low barrier to entry for attackers, requiring only network access via HTTP and low-level privileges on the target system. This means that an attacker does not need high-level administrative credentials or complex social engineering tactics to initiate an attack. Instead, any user with basic authenticated access to the ORDS interface can leverage this flaw to manipulate data states beyond their intended permissions. The absence of required user interaction further simplifies the exploitation process, allowing for automated and scalable attacks against vulnerable instances without manual intervention from a human operator on the target side.
The operational impact of successfully exploiting this vulnerability is substantial, primarily affecting both the confidentiality and integrity aspects of information security as reflected in its CVSS 3.1 base score of 5.4. Attackers can achieve unauthorized read access to a subset of accessible data, leading to potential data leakage and privacy violations. More critically, they gain the ability to perform unauthorized updates, inserts, or deletes against ORDS-managed resources. This integrity compromise means that critical business records could be altered, corrupted, or removed entirely without detection by standard audit logs if logging mechanisms are not sufficiently granular. Such actions can disrupt business operations, lead to financial loss through fraudulent transactions, and damage organizational reputation due to data tampering.
From a threat intelligence perspective, this vulnerability aligns with MITRE ATT&CK techniques related to privilege escalation and unauthorized access via application layer protocols. Specifically, it relates to the exploitation of API endpoints where input validation and authorization checks are improperly implemented. The vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N highlights that while availability is not directly impacted in this specific scenario, the lateral movement potential increases as compromised accounts can be used to pivot within the network environment if ORDS serves as a gateway to more sensitive internal systems.
To mitigate these risks, organizations must immediately apply the latest security patches provided by Oracle for all affected versions of REST Data Services. Until patching is feasible, implementing strict firewall rules to restrict HTTP access to only trusted IP addresses can reduce the attack surface significantly. Additionally, deploying Web Application Firewalls with specific rule sets designed to detect anomalous API behavior or unauthorized data manipulation attempts can provide an additional layer of defense. It is also crucial to review and tighten database-level permissions for accounts associated with ORDS, ensuring that they adhere to the principle of least privilege even if the application-layer controls are temporarily insufficient. Regular auditing of access logs should be conducted to identify any signs of exploitation activity during the window of vulnerability exposure.