CVE-2026-83278 in Helidon
Summary
by MITRE • 09/16/2026
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-integrations-neo4j). Supported versions that are affected are 3.0.0-3.2.20 and 4.0.0-4.5.4. Difficult to exploit vulnerability allows unauthenticated attacker with access to the physical communication segment attached to the hardware where the Helidon executes 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 6.8 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:H/PR:N/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-integrations-neo4j 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 relying on these specific iterations for their microservices architecture, as it compromises the integrity and confidentiality of data managed by Neo4j graph database integrations. The core issue stems from insufficient validation or sanitization mechanisms within the integration layer, which allows an attacker to manipulate interactions with the underlying database without proper authentication checks in certain operational contexts. This deficiency undermines the fundamental security boundary that Helidon is designed to enforce between application services and persistent storage layers.
The exploitability of this vulnerability is characterized by a high complexity requirement, as indicated by the CVSS vector attribute AC:H which denotes High Attack Complexity. Furthermore, the attack vector AV:A signifies that the attacker must have access to the physical communication segment attached to the hardware where Helidon executes. This constraint implies that remote exploitation over standard network interfaces such as TCP/IP is not feasible without prior lateral movement or physical proximity to the infrastructure. An unauthenticated attacker with local network access can leverage this flaw, but they cannot do so from a distant location via the public internet. The requirement for physical segment access serves as a critical mitigating factor that limits the immediate threat landscape compared to remotely exploitable vulnerabilities, yet it remains severe within internal or private cloud environments where such segmentation might be lax or compromised.
Successful exploitation of this vulnerability results in substantial impacts on both data confidentiality and integrity, aligning with CVSS 3.1 base scores indicating High impact for these categories while Availability is rated as None. Specifically, an attacker can achieve unauthorized creation, deletion, or modification of critical data stored within the Neo4j database accessible to Helidon. This capability allows for the alteration of business logic dependencies that rely on graph relationships, potentially leading to corrupted decision-making processes or compromised application states. Additionally, the vulnerability grants complete access to all Helidon-accessible data, enabling the exfiltration of sensitive information such as user credentials, proprietary intellectual property, or personal identifiable information depending on the specific use case of the integrated Neo4j instance. This level of unauthorized access effectively bypasses authentication controls that should protect these resources, representing a severe breach of security boundaries.
From an industry standard perspective, this vulnerability maps to CWE-287 Improper Authentication and CWE-918 SQL Injection if the underlying mechanism involves query manipulation, though in graph databases it may relate more closely to CWE-643 Exposure of Data to Unauthorized Actors via improper access controls within the integration layer. In terms of MITRE ATT&CK framework tactics, this flaw facilitates Initial Access through lateral movement from a compromised host on the same network segment and enables Lateral Movement or Collection depending on how the data is subsequently used by other services in the microservices mesh. The lack of authentication for specific internal API endpoints or database drivers constitutes a failure to implement defense-in-depth principles, allowing an attacker who has breached one part of the system to pivot effectively into critical data stores.
Mitigation strategies must prioritize immediate patching to the latest supported versions of Helidon where this issue has been resolved by Oracle Fusion Middleware engineering teams. Organizations should also enforce strict network segmentation policies that isolate database servers and middleware components from general user access networks, ensuring that even if an attacker gains a foothold on a host within the communication segment, they cannot reach the critical infrastructure without additional authentication steps or firewall rules. Implementing mutual TLS for internal service-to-service communications can further mitigate this risk by requiring certificate-based authentication regardless of network location. Regular vulnerability scanning focused on internal segments and continuous monitoring of database access logs for anomalous patterns will help detect potential exploitation attempts before significant data loss occurs.