CVE-2026-91491 in Identity Manager Connector
Summary
by MITRE • 10/21/2026
Vulnerability in the Oracle Identity Manager Connector product of Oracle Fusion Middleware (component: LDAP Gateway). Supported versions that are affected are 12.2.1.4.0 and 14.1.2.1.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via LDAP to compromise Oracle Identity Manager Connector. Successful attacks of this vulnerability can result in takeover of Oracle Identity Manager Connector. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 10/22/2026
The identified vulnerability resides within the LDAP Gateway component of Oracle Identity Manager Connector, a critical subsystem in Oracle Fusion Middleware versions 12.2.1.4.0 and 14.1.2.1.0. This security flaw represents a severe risk to enterprise identity management infrastructure because it allows for unauthenticated remote code execution or system compromise via the Lightweight Directory Access Protocol. The vulnerability is classified as easily exploitable, requiring no user interaction or prior authentication credentials from an attacker who possesses network access to the target service. This characteristic significantly lowers the barrier to entry for malicious actors, enabling them to leverage standard LDAP communication channels to exploit the flaw without needing valid domain accounts or complex social engineering tactics.
From a technical perspective, the root cause of this vulnerability likely involves improper validation or handling of input data within the LDAP Gateway interface. When an attacker sends specifically crafted LDAP requests, the application fails to adequately sanitize or verify these inputs before processing them. This lack of robust boundary checking allows malicious payloads to bypass security controls and execute arbitrary commands on the underlying system hosting the Oracle Identity Manager Connector. The absence of authentication requirements means that any entity capable of reaching the network port associated with this service can attempt exploitation, turning a standard directory access protocol into an attack vector for complete system takeover.
The operational impact of successfully exploiting this vulnerability is catastrophic, as indicated by its high severity rating. An attacker who gains control over the Oracle Identity Manager Connector effectively achieves administrative dominance over the identity management environment. This level of compromise enables the modification of user identities, roles, and permissions across connected systems, facilitating unauthorized access to sensitive corporate resources. Furthermore, the ability to take over the connector allows for lateral movement within the network, data exfiltration, and potential disruption of critical business processes that rely on accurate identity provisioning and de-provisioning workflows. The integrity of the entire trust framework managed by Oracle Identity Manager is undermined when this component is compromised.
This vulnerability aligns with Common Weakness Enumeration categories such as CWE-20 Improper Input Validation and CWE-78 OS Command Injection, depending on the specific mechanism exploited within the LDAP Gateway. In terms of offensive security frameworks, it maps to MITRE ATT&CK techniques including T1190 Exploit Public-Facing Application and potentially T1053 Scheduled Task/Job if persistence mechanisms are established post-exploitation. The high availability impact also suggests potential for denial-of-service conditions alongside confidentiality and integrity breaches, making this a critical threat vector that requires immediate attention from security operations teams responsible for maintaining the Oracle Fusion Middleware estate.
Mitigation strategies must prioritize immediate patching of all affected versions to their latest supported release levels where the underlying code flaws have been addressed by Oracle engineering. Organizations should also implement network segmentation to restrict LDAP traffic to only authorized management subnets, thereby reducing the attack surface exposed to potential attackers on broader networks. Additionally, deploying intrusion detection systems with signatures capable of identifying anomalous LDAP query patterns can provide an early warning mechanism for exploitation attempts. Regular vulnerability scanning and penetration testing focused on identity management components are essential to ensure that such gaps do not persist in production environments, ensuring the integrity and availability of critical identity services remain uncompromised.