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": "2026-08-18T21:18:17.050Z",
  "pubdate": "2026-08-18T21:18:17.050Z",
  "executiveSummary": "An unauthenticated information disclosure vulnerability has been identified within the Helidon product of Oracle Fusion Middleware, specifically affecting the Imperative Web Server component in version 3.2.18. This security flaw is classified as easily exploitable, allowing remote threat actors with network access via the HTTP protocol to compromise the confidentiality of the target system without requiring any prior authentication or user interaction.\nSuccessful exploitation of this vulnerability grants unauthorized access to critical data or complete access to all data accessible by the Helidon runtime environment. The impact is strictly confined to the confidentiality vector, resulting in potential exposure of sensitive application data, internal configurations, or business-critical assets. Given the network-based attack vector and the absence of required privileges, the vulnerability poses significant risk to organizations deploying the affected version.\nSecurity teams must address this exposure promptly by implementing appropriate network controls, monitoring HTTP traffic directed at the Imperative Web Server, and applying vendor-supplied updates or patches as soon as they become officially available for the affected Oracle Fusion Middleware component.",
  "technicalDetails": "The vulnerability resides within the Imperative Web Server component of Oracle Fusion Middleware Helidon version 3.2.18. This component is responsible for handling incoming HTTP requests and managing web server operations. Due to insufficient input validation, access control enforcement, or improper handling of HTTP requests within the affected codebase, an unauthenticated remote attacker can bypass security boundaries designed to protect sensitive endpoints or underlying data stores.\nThe attack vector is network-based (AV:N), leveraging standard HTTP protocol communications to interact with the vulnerable web server. The complexity of the attack is low (AC:L), meaning no specialized conditions, race conditions, or complex configurations are required for successful exploitation. Furthermore, the vulnerability requires zero privileges (PR:N) and zero user interaction (UI:N), allowing automated scanning tools or malicious scripts to directly target exposed instances.\nDuring a typical attack flow, an adversary crafts a malicious HTTP request directed at the vulnerable Helidon Imperative Web Server. Upon receiving the request, the flawed component fails to properly validate the caller's authorization state or incorrectly processes the request parameters, leading to the exposure of unauthorized data streams. The payload behavior centers on extracting confidential information rather than altering data integrity or causing a denial of service, aligning with the CVSS score of 7.5 for confidentiality impact (C:H, I:N, A:N) under the scope unchanged (S:U) metric.\nPost-exploitation impact is characterized by the retrieval of critical data accessible via the Helidon process. Depending on the context of the deployment, this may include internal application state data, session identifiers, database connection strings, or proprietary business logic outputs exposed through the unauthenticated channels of the Imperative Web Server."
}