CVE-2026-73921

CriticalCVSS 9.8

Published: 18/08/2026(UTC)Translated: 19/08/2026(UTC)NVD NIST

Summary

A vulnerability in Oracle Fusion Middleware's Helidon product (Imperative Web Server component) version 1.4.20 allows an unauthenticated attacker to compromise Helidon via HTTP, resulting in a complete takeover of Helidon.

Risk Assessment

An attacker could completely take over the Helidon system, potentially leading to full compromise of data and services, and further attacks within the infrastructure.

Recommendation

Immediately upgrade Helidon to a patched version. Also restrict access to the service and monitor HTTP traffic.

Original NVD description (English source)

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). The supported version that is affected is 1.4.20. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in takeover of Helidon. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).