CVE-2026-101512 in Database Server
Summary
by MITRE • 10/21/2026
Vulnerability in the RDBMS component of Oracle Database Server. Supported versions that are affected are 23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having None privilege with network access via HTTP to compromise RDBMS. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all RDBMS accessible data. CVSS 3.1 Base Score 6.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Relational Database Management System component of Oracle Database Server, specifically affecting supported versions ranging from 23.4.0 through 23.26.3. This security flaw represents a significant risk to database integrity and confidentiality because it allows for unauthorized access by attackers who possess only low-level privileges. The exploitability vector is particularly concerning as it leverages network accessibility via the HTTP protocol, meaning that an attacker does not need physical or local shell access to initiate the attack. Instead, remote interaction over standard web ports can trigger the underlying flaw in the database engine logic.
From a technical perspective, this vulnerability enables low-privileged attackers with no prior authentication privileges and network-level access to compromise the RDBMS functionality. The core issue likely stems from improper validation or handling of HTTP-based requests within the database server's internal processing mechanisms. When an attacker sends specifically crafted HTTP traffic to the vulnerable service endpoints, they can bypass expected security controls that should restrict their actions based on their assigned user role. This failure in access control logic allows the execution of operations that are normally reserved for higher-privileged accounts or administrative functions, effectively elevating the attacker's capabilities within the database environment without requiring valid credentials for those elevated roles.
The operational impact of this vulnerability is severe due to its direct effect on data confidentiality. Successful exploitation results in unauthorized access to critical data stored within the database and can lead to complete access to all RDBMS accessible data. This means that sensitive information such as customer records, financial transactions, intellectual property, or proprietary business logic could be exfiltrated by malicious actors. The CVSS 3.1 base score of 6.5 reflects a medium severity rating primarily driven by high confidentiality impact. While the vector string indicates no immediate integrity or availability compromise in this specific assessment, the ability to read all accessible data constitutes a major breach of security principles and can have devastating consequences for organizations relying on Oracle Database for their core operations.
In terms of industry standard classifications, this vulnerability aligns with CWE-269 Improper Privilege Management and potentially CWE-749 Exposure of Sensitive Information to an Unauthorized Actor. The attack vector corresponds to ATT&CK technique T1059 Command and Scripting Interpreter if the flaw allows for code execution, or more broadly falls under lateral movement and data exfiltration phases depending on how the compromised access is utilized post-exploitation. The network-based nature via HTTP places it within remote exploitation categories that are frequently targeted by automated scanning tools and advanced persistent threats seeking to pivot through database layers.
Mitigation strategies must prioritize immediate patching of all affected Oracle Database Server versions to 23.4.0-23.26.3 or later, where the vendor has presumably addressed the underlying logic flaw. Organizations should also implement strict network segmentation policies to ensure that database servers are not directly exposed to untrusted networks via HTTP ports unless absolutely necessary for specific application requirements. If exposure is unavoidable, deploying Web Application Firewalls with deep packet inspection capabilities can help detect and block malicious payloads targeting this vulnerability before they reach the database engine. Additionally, enforcing principle of least privilege across all user accounts ensures that even if an attacker gains initial foothold through low-privileged credentials, their ability to cause widespread damage remains limited until further exploitation steps are taken. Regular security audits and penetration testing focused on HTTP interfaces interacting with the RDBMS will help identify similar misconfigurations or unpatched vulnerabilities in the future.