CVE-2026-73905: Critical severity Oracle Helidon (Imperative Web Server) vulnerability
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 4.0.0-4.4.1. 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).
Affected Software
Event History
Frequently Asked Questions
Who is exposed to exploitation?
Deployments running the affected supported Oracle Helidon Imperative Web Server version 4.5.0 are exposed if an attacker can reach the server over HTTP. The attacker does not need an account or prior privileges.
What level of access does an attacker need?
An unauthenticated attacker needs only network access via HTTP. The CVSS vector indicates low attack complexity and no user interaction requirement.
What could a successful attack do?
Successful exploitation can result in takeover of Helidon. The reported impacts include high confidentiality, integrity, and availability impact.