CVE-2026-101383 in REST Data Services
Summary
by MITRE • 10/21/2026
Vulnerability in Oracle REST Data Services (component: Core). Supported versions that are affected are 24.2.0-26.1.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle REST Data Services. Successful attacks require human interaction from a person other than the attacker. 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:N/UI:R/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 26.1.0. This vulnerability presents a significant risk to organizations relying on this service for exposing relational data via standard web protocols. The core issue stems from an improper validation mechanism that allows unauthenticated actors, who possess network access and can communicate over HTTP, to interact with the system in unintended ways. While the attack vector is remote and requires no prior authentication credentials, it does necessitate human interaction, specifically requiring a user other than the attacker to perform certain actions or click on malicious links before exploitation can be fully realized. This characteristic places the vulnerability within the domain of social engineering vectors where trust is exploited to bypass technical controls.
The technical nature of this flaw aligns with CWE-20 Improper Input Validation and potentially CWE-79 Cross-site Scripting if user input is not properly sanitized before being processed or reflected back to other users. The operational impact is twofold, affecting both the confidentiality and integrity of data managed by Oracle REST Data Services. An attacker who successfully exploits this vulnerability can gain unauthorized read access to a subset of accessible data, leading to potential information disclosure that could include sensitive business records, personal identifiable information, or proprietary configurations. Furthermore, the flaw permits unauthorized updates, inserts, or deletes against certain datasets under the service's control. This integrity violation means an adversary could alter critical database entries, delete essential records, or inject malicious data, thereby disrupting business operations and compromising the trustworthiness of the stored information.
From a strategic perspective, this vulnerability maps to several techniques within the MITRE ATT&CK framework. The requirement for human interaction suggests alignment with T1566 Phishing, where an attacker might lure a legitimate user into triggering the exploit through deceptive means such as malicious URLs embedded in emails or web pages. Once executed, the ability to read data corresponds to T1005 Data from Local System while the capacity to modify or delete records maps directly to T1078 Valid Accounts if the service uses session-based authentication that is hijacked or manipulated, or more broadly to T1496 Endpoint Denial of Service if deletion leads to operational disruption. The low attack complexity and network accessibility make this a high-priority target for automated scanning tools used by threat actors seeking quick wins against unpatched systems.
Mitigation strategies must prioritize immediate patching as the primary defense vector. Organizations should upgrade Oracle REST Data Services to a version beyond 26.1.0 where these validation issues have been resolved by the vendor. In environments where immediate upgrading is not feasible due to operational constraints, network segmentation and strict access control lists can help mitigate risk by restricting HTTP traffic from untrusted networks to the servers hosting vulnerable instances. Additionally, implementing Web Application Firewalls with rules designed to detect anomalous input patterns associated with injection or cross-site scripting attacks may provide a layer of defense in depth. Security teams should also enforce strong authentication policies and monitor for unusual data access patterns that could indicate exploitation attempts. Regular security awareness training is recommended to reduce the likelihood of human interaction being leveraged by attackers, thereby addressing the specific UI:R requirement noted in the CVSS vector.