Description

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 access to critical data or complete access to all Helidon accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.5",
  "pubDate": "2026-08-18T21:18:23.460Z",
  "pubdate": "2026-08-18T21:18:23.460Z",
  "executiveSummary": "An unauthenticated information disclosure vulnerability affects the Oracle Fusion Middleware Helidon product, specifically within the Imperative Web Server component in version 3.2.18. This security flaw allows remote attackers with network access via the HTTP protocol to compromise the system and achieve unauthorized access to critical data or complete access to all Helidon accessible data.\nThe vulnerability carries a CVSS 3.1 Base Score of 7.5 with a vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, indicating a high severity rating focused strictly on confidentiality impacts. The attack vector is network-based, requiring low attack complexity with no privileges or user interaction needed for successful exploitation.\nThe risk implications are significant for organizations deploying the affected Helidon version, as malicious actors can harvest sensitive information without prior authentication. Remediation requires applying vendor-supplied updates or implementing appropriate network and application-layer defenses to restrict unauthorized access to the Imperative Web Server.",
  "technicalDetails": "The vulnerability resides within the Imperative Web Server component of Oracle Helidon version 3.2.18. The root cause stems from insufficient validation or improper access controls within the HTTP request handling logic, allowing external entities to bypass security boundaries and retrieve sensitive data stored or processed by the application.\nExploitation is conducted over the network via standard HTTP protocol communications. Because the vulnerability requires no authentication and no user interaction, an attacker can directly target the exposed Imperative Web Server endpoints with crafted HTTP requests. The low attack complexity indicates that the flaw is easily exploitable by automated tools or malicious actors without specialized knowledge of the underlying infrastructure.\nThe attack flow proceeds as follows: First, the unauthenticated attacker identifies a network-accessible endpoint running the vulnerable Imperative Web Server component of Helidon 3.2.18. Second, the attacker transmits a specially crafted HTTP request designed to trigger the flaw in the request processing or routing logic. Third, the vulnerable component fails to properly enforce confidentiality restrictions, improperly exposing sensitive internal resources, configuration data, or application payloads in the HTTP response.\nPost-exploitation impact is characterized by a complete compromise of data confidentiality. The attacker gains unauthorized access to critical data or total access to all data accessible through the Helidon instance. While integrity and availability impacts are negligible according to the CVSS vector, the severe breach of confidentiality can lead to secondary compromises if sensitive credentials, tokens, or business logic data are exfiltrated."
}