CVE-2026-73922 in Helidon
Summary
by MITRE • 08/19/2026
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 1.4.19. Easily exploitable vulnerability allows unauthenticated 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 9.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).
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Analysis
by VulDB Data Team • 08/19/2026
The vulnerability identified in Oracle Fusion Middleware's Helidon product, specifically within the Imperative Web Server component of version 1.4.19, represents a critical security flaw that allows for significant unauthorized access to system resources. This issue is classified under CWE-287, which denotes Improper Authentication, as it permits an unauthenticated attacker to bypass necessary verification mechanisms. The affected component serves as the primary entry point for HTTP-based interactions with the Helidon application server, making this vulnerability particularly dangerous due to its network accessibility and low barrier to exploitation.
The technical nature of this flaw involves a failure in the access control logic within the Imperative Web Server module. Because the vulnerability is easily exploitable via standard HTTP requests without requiring any prior authentication or user interaction, it effectively neutralizes the security perimeter designed to protect critical data stores managed by Helidon. An attacker with network access can send crafted requests that trigger this flaw, leading directly to a compromise of the underlying data integrity and confidentiality mechanisms. The absence of required credentials means that even users who should have no privileges can interact with sensitive endpoints as if they were administrators or trusted entities.
The operational impact of successfully exploiting this vulnerability is severe, encompassing both high-impact Confidentiality and Integrity effects while leaving Availability largely unaffected according to the provided CVSS metrics. Attackers gain the ability to create, delete, or modify critical data within the Helidon environment. This capability extends beyond just sensitive records; it grants access to all data accessible by the Helidon instance. Consequently, organizations relying on this middleware for transaction processing, user management, or configuration storage face the risk of total data compromise, including potential manipulation of business-critical information that could lead to financial loss, regulatory non-compliance, and reputational damage.
From a threat modeling perspective aligned with MITRE ATT&CK frameworks, this vulnerability facilitates initial access followed by immediate privilege escalation through improper authentication controls. It aligns closely with techniques such as T1078 Valid Accounts if the attacker leverages default or weak credentials, but more critically it represents a fundamental breakdown in identity verification that allows direct unauthorized entry. The high base score of 9.1 reflects the ease of exploitation and the broad scope of data exposure possible through this single flaw. It is not limited to specific user roles but affects any network-connected entity capable of reaching the web server interface, thereby expanding the attack surface significantly across distributed environments where Helidon is deployed as a microservices gateway or backend service handler.
Mitigation strategies must prioritize immediate patching and configuration hardening. Oracle has released updates addressing this issue in subsequent versions of Helidon beyond 1.4.19; therefore, upgrading to a patched version is the most effective remediation step. In environments where an upgrade cannot be implemented immediately due to compatibility constraints or operational downtime requirements, network-level controls should be enforced. This includes restricting HTTP access to the Imperative Web Server component via firewall rules or reverse proxy configurations that limit source IP addresses to only those explicitly authorized for administrative functions. Additionally, implementing strict input validation and enforcing robust authentication mechanisms at the application layer can provide a secondary defense-in-depth measure against exploitation attempts until the software is fully updated. Regular vulnerability scanning should also be conducted to detect any residual exposure of this specific component version across the infrastructure.