CVE-2026-83460 in Helidon
Summary
by MITRE • 09/16/2026
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: LRA). Supported versions that are affected are 4.0.0-4.5.4. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Helidon accessible data as well as unauthorized read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 6.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N).
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Analysis
by VulDB Data Team • 09/16/2026
The identified vulnerability resides within the Long-Running Action or LRA component of Oracle Fusion Middleware Helidon, specifically affecting versions ranging from 4.0.0 through 4.5.4. This security flaw represents a significant risk to organizations relying on this middleware for distributed transaction management and microservices orchestration. The core issue stems from insufficient access control mechanisms within the HTTP interface exposed by the LRA module. Because the vulnerability is easily exploitable, it allows an unauthenticated attacker who has network access via HTTP to compromise the integrity of the Helidon application environment without needing valid credentials or user interaction. This lack of authentication requirement makes the attack vector particularly dangerous in production environments where such endpoints might be inadvertently exposed to internal networks or, worse, the public internet if not properly secured by perimeter defenses.
From a technical perspective, the flaw enables unauthorized modification and retrieval of data managed by Helidon. Successful exploitation permits an attacker to perform unauthorized update, insert, or delete operations against accessible data stores associated with the LRA component. Additionally, the vulnerability grants unauthorized read access to a subset of this data. This dual impact on both confidentiality and integrity indicates that the application fails to properly validate requests before executing state-changing commands or returning sensitive information. The absence of proper authorization checks allows malicious actors to manipulate transaction states, corrupt distributed lock records, or exfiltrate critical business logic metadata stored within the LRA context. Such actions can disrupt ongoing transactions, lead to data inconsistency across microservices, and expose proprietary information that should remain restricted to authenticated administrative users or authorized service accounts.
The operational impact of this vulnerability is substantial, particularly for enterprises utilizing Helidon in high-availability distributed systems. An attacker leveraging this flaw could destabilize the transactional consistency of applications built on top of Oracle Fusion Middleware. By altering LRA state data, an adversary might cause phantom transactions to persist indefinitely or prematurely commit incomplete operations, leading to severe data corruption and service degradation. Furthermore, the ability to read sensitive configuration details or internal identifiers can facilitate further reconnaissance and more targeted attacks against other components within the middleware stack. The CVSS 3.1 base score of 6.5 reflects a medium severity rating, driven by network accessibility, low complexity, and no required privileges for exploitation. However, in practice, the impact on business continuity and data integrity could escalate this to high or critical depending on the specific application logic dependent on Helidon LRA services.
Industry standards classify this type of flaw under CWE-269, which denotes Improper Privilege Management, as well as CWE-862, Missing Authorization. The attack pattern aligns with MITRE ATT&CK techniques related to Initial Access and potentially Persistence if the attacker modifies system configurations or creates backdoor entries within the LRA data structures. To mitigate this risk, organizations must immediately apply the latest security patches provided by Oracle for Helidon versions 4.0.0 through 4.5.4. In environments where patching is not immediately feasible, it is imperative to restrict network access to the HTTP endpoints associated with the LRA component using firewall rules or reverse proxy configurations that enforce authentication and IP whitelisting. Additionally, implementing strict input validation and ensuring that all administrative interfaces require robust multi-factor authentication can significantly reduce the attack surface. Regular security audits and penetration testing focused on API authorization logic are recommended to detect similar misconfigurations before they can be exploited by malicious actors.