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 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).

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.1",
  "pubDate": "2026-08-18T21:18:24.487Z",
  "pubdate": "2026-08-18T21:18:24.487Z",
  "executiveSummary": "An unauthenticated, remotely exploitable vulnerability affects the Imperative Web Server component of Oracle Fusion Middleware Helidon version 3.2.18. This security flaw enables network-based attackers to interact directly with the targeted application via the HTTP protocol without requiring prior authentication or user interaction. Successful exploitation of this vulnerability grants unauthorized actors extensive privileges to compromise data confidentiality and integrity. Specifically, attackers can achieve unauthorized creation, modification, or deletion of critical application data, alongside full read access to sensitive information accessible via Helidon. With a CVSS 3.1 Base Score of 9.1, the vulnerability poses a severe risk to enterprise deployments relying on the affected software. The low attack complexity and lack of requisite privileges or user interaction make this issue critical for organizations utilizing Helidon 3.2.18, necessitating immediate prioritization of defensive countermeasures and patch management procedures where available.",
  "technicalDetails": "The vulnerability resides within the Imperative Web Server component of Oracle Fusion Middleware Helidon version 3.2.18. The root cause stems from insufficient access controls or improper handling of incoming HTTP requests processed by the server, allowing remote clients to bypass security boundaries and execute unauthorized operations. The attack vector is strictly network-based, utilizing standard HTTP protocols to deliver malicious payloads directly to the vulnerable endpoint without requiring any form of authentication, authorization tokens, or user interaction. The attack flow begins with an unauthenticated attacker crafting malicious HTTP requests directed at the Helidon Imperative Web Server. Due to inadequate validation or enforcement mechanisms within the component, the server processes these requests as legitimate operations. Consequently, the attacker can leverage these interactions to bypass intended security controls, leading to post-exploitation impacts that include complete data compromise. The confidentiality and integrity of critical data managed or accessible by Helidon are severely degraded, as the attacker gains the capability to view sensitive records as well as perform unauthorized creation, modification, or deletion actions. While the availability vector remains unaffected according to the CVSS metric, the severe compromise of data integrity and confidentiality presents an immediate and critical threat to the underlying application environment and associated data stores."
}