CVE-2026-83439 in Helidon
Summary
by MITRE • 09/16/2026
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-security-providers-idcs-mapper). Supported versions that are affected are 3.0.0-3.2.20 and 4.0.0-4.5.4. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Helidon accessible data as well as unauthorized access to critical data or complete access to all Helidon accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the helidon-security-providers-idcs-mapper component of Oracle Fusion Middleware, specifically affecting Helidon versions ranging from 3.0.0 through 3.2.20 and 4.0.0 through 4.5.4. This security flaw represents a significant risk to organizations utilizing these specific iterations of the Helidon microservices framework for building cloud-native applications. The core issue stems from an insufficient validation or authorization check within the identity center mapper logic, which serves as a bridge between external authentication providers and internal application roles. Because this component is responsible for mapping incoming security tokens to local user identities and permissions, any weakness in its processing logic can lead to severe privilege escalation scenarios where an attacker bypasses intended access controls.
The technical nature of this flaw allows exploitation by low-privileged attackers who possess network connectivity via HTTP protocols. This indicates that the vulnerability does not require high-level system privileges or complex physical proximity to exploit; rather, it relies on the ability to send crafted requests over the network interface where Helidon is exposed. The attack vector involves manipulating inputs related to identity mapping processes, potentially exploiting how the mapper handles token claims or role assignments. By crafting specific HTTP requests that leverage this logic error, an attacker can trick the system into granting elevated privileges or accessing data structures that should remain restricted. This aligns with common patterns found in CWE-287 Improper Authentication and CWE-269 Improper Privilege Management, where the software fails to correctly enforce security policies during identity verification steps.
The operational impact of a successful exploitation is severe, characterized by high impacts on both confidentiality and integrity as reflected in the CVSS 3.1 base score of 8.1. Attackers who exploit this vulnerability can achieve unauthorized creation, deletion, or modification of critical data within the Helidon environment. Furthermore, they may gain complete access to all data accessible through Helidon services, leading to comprehensive data breaches. This level of compromise allows for significant disruption of business operations and potential loss of sensitive information integrity. The ability to modify critical data also poses risks related to system stability and trustworthiness, as attackers could alter configuration settings or inject malicious payloads into the application flow. From a threat modeling perspective, this behavior is consistent with ATT&CK techniques such as T1078 Valid Accounts for initial access via compromised credentials and T1098 Account Manipulation if the attacker modifies existing account permissions to maintain persistence.
Mitigation strategies must prioritize immediate patching of affected Helidon instances to versions that include the vendor's security fixes, ensuring that all systems within the supported range are updated beyond 3.2.20 or 4.5.4 respectively. In environments where upgrading is not immediately feasible, network-level controls should be implemented to restrict access to the vulnerable endpoints, limiting exposure only to trusted IP ranges and enforcing strict TLS encryption to prevent simple HTTP-based exploitation attempts if applicable. Additionally, organizations should review their identity provider configurations to ensure that role mappings are validated against least-privilege principles. Regular auditing of authentication logs can help detect anomalous patterns indicative of attempted privilege escalation attacks targeting this specific component. Continuous monitoring for unusual data access patterns or unauthorized modifications serves as a critical defense-in-depth measure while the underlying code vulnerability is addressed through official vendor updates.