CVE-2026-73916 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 3.2.18. 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 identified vulnerability resides within the Imperative Web Server component of Oracle Fusion Middleware Helidon, specifically affecting version 3.2.18. This security flaw represents a critical weakness in the application layer that permits unauthenticated attackers to exploit the system over standard HTTP network connections. The absence of required authentication for this attack vector significantly lowers the barrier to entry for malicious actors, allowing them to interact directly with the web server interface without needing valid credentials or prior access privileges.
The technical nature of this flaw enables an attacker to perform unauthorized operations that compromise both the confidentiality and integrity of data managed by Helidon. Successful exploitation allows the creation, deletion, or modification of critical data stored within the application's scope. Furthermore, it grants the ability to read sensitive information that would otherwise be protected from external access. This dual impact on confidentiality and integrity suggests a fundamental failure in input validation, authorization checks, or state management mechanisms inherent to the Imperative Web Server implementation in this specific version.
From an operational perspective, the consequences of exploiting this vulnerability are severe for organizations relying on Helidon for their middleware infrastructure. The ability to modify critical data can lead to significant business disruption, financial loss, and reputational damage due to corrupted records or altered application states. Simultaneously, unauthorized access to sensitive data exposes the organization to regulatory non-compliance issues under frameworks such as GDPR, HIPAA, or PCI-DSS, depending on the nature of the data involved. The high availability impact is noted as none in the CVSS score, indicating that while data integrity and secrecy are compromised, the service itself may remain technically operational during the attack, potentially masking the intrusion for a period.
This vulnerability aligns with Common Weakness Enumeration (CWE) categories such as CWE-269 Improper Privilege Management or CWE-798 Use of Hard-coded Credentials if authentication bypass is involved, though more likely it maps to CWE-352 Cross-Site Request Forgery or CWE-918 Server-Side Request Forgery depending on the specific mechanism. In terms of the MITRE ATT&CK framework, this activity corresponds to techniques involving Initial Access via web services and potentially Data Exfiltration over a common network port such as HTTP. The attack vector is classified as Network with Low Attack Complexity and requires no User Interaction, which classifies it as highly exploitable in automated threat scenarios.
To mitigate the risk associated with CVE details matching this description, immediate patching to a version of Helidon where this flaw has been resolved is the primary recommendation. Organizations should also implement network-level controls such as Web Application Firewalls (WAFs) that can detect and block anomalous HTTP requests targeting vulnerable endpoints. Additionally, enforcing strict input validation on all server-side components and ensuring that sensitive data access requires robust authentication mechanisms even for internal services can help reduce the attack surface. Regular security audits and penetration testing focused on web application logic flaws are essential to identify similar vulnerabilities before they can be exploited in production environments.