CVE-2026-73935: High 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 4.0.0-4.5.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Helidon. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Affected Software
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An unauthenticated attacker with network access to the affected Helidon Imperative Web Server over HTTP/2 can exploit it. No privileges or user interaction are required.
What is the impact of successful exploitation?
Successful exploitation can cause Helidon to hang or crash repeatedly, resulting in a complete denial of service. The provided CVSS vector indicates no confidentiality or integrity impact.
Which deployment conditions are affected?
The affected supported version identified is Helidon Imperative Web Server 4.5.1. Exposure requires that an attacker can reach the server via HTTP/2.