CVE-2026-91311 in JD Edwards EnterpriseOne Tools
Summary
by MITRE • 10/21/2026
Vulnerability in the JD Edwards EnterpriseOne Tools product of Oracle JD Edwards (component: Installation Security). Supported versions that are affected are 9.2.0.0-9.2.26.5. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where JD Edwards EnterpriseOne Tools executes to compromise JD Edwards EnterpriseOne Tools. Successful attacks of this vulnerability can result in takeover of JD Edwards EnterpriseOne Tools. CVSS 3.1 Base Score 7.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 10/21/2026
The identified vulnerability resides within the Installation Security component of Oracle JD Edwards EnterpriseOne Tools, specifically affecting versions ranging from 9.2.0.0 through 9.2.26.5. This flaw represents a critical security deficiency that undermines the integrity and confidentiality of the enterprise resource planning environment by allowing unauthorized access to sensitive system configurations and data stores. The vulnerability is classified as having a high severity, indicated by a CVSS version 3.1 base score of 7.8, which reflects significant potential for compromise across all three pillars of information security: confidentiality, integrity, and availability.
From a technical perspective, the core issue stems from insufficient access controls or improper validation mechanisms within the installation and configuration processes of the JD Edwards EnterpriseOne Tools suite. While the vulnerability requires an attacker to have low-privileged logon access to the infrastructure where the tools execute, it does not require user interaction for exploitation. This characteristic significantly lowers the barrier to entry for malicious actors who may already possess a foothold in the network through phishing, credential theft, or other initial access vectors. Once authenticated at this low privilege level, an attacker can exploit the flaw to escalate privileges and gain control over the JD Edwards EnterpriseOne Tools environment itself.
The operational impact of successfully exploiting this vulnerability is severe, resulting in a complete takeover of the affected system components. An adversary with such access could manipulate critical business data, alter financial records, disrupt ongoing operations by denying service to legitimate users, or exfiltrate sensitive corporate information for competitive advantage or ransomware deployment. The ability to compromise confidentiality means that proprietary algorithms, customer lists, and financial strategies are at risk of exposure. Simultaneously, the integrity impact allows attackers to modify system configurations or data without detection, potentially leading to long-term persistence and undetected malicious activity within the enterprise network.
This vulnerability aligns with Common Weakness Enumeration (CWE) categories such as CWE-269 Improper Privilege Management and CWE-732 Incorrect Permission Assignment for Critical Resource. These classifications highlight that the root cause lies in the failure to enforce appropriate security policies during the installation or runtime configuration phases, allowing lower-level accounts to perform actions reserved for higher-privileged administrators. Furthermore, from a tactical standpoint related to the MITRE ATT&CK framework, this vulnerability facilitates techniques associated with Privilege Escalation and potentially Defense Evasion if used to modify logging mechanisms or hide tracks after gaining initial access.
Mitigation strategies must focus on immediate patching of all affected JD Edwards EnterpriseOne Tools versions to 9.2.26.5 or later where the flaw has been addressed by Oracle. In addition to applying vendor-supplied patches, organizations should enforce strict least-privilege principles across their IT infrastructure. This includes ensuring that service accounts and application users operate with only the minimum permissions necessary for their specific functions, thereby limiting the potential blast radius if a low-level account is compromised. Network segmentation should also be reviewed to ensure that systems hosting JD Edwards components are isolated from less secure network zones, reducing the likelihood of an attacker reaching the vulnerable infrastructure in the first place. Regular auditing of installation logs and configuration changes can help detect any unauthorized attempts to exploit this weakness before significant damage occurs.