CVE-2026-73936: 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 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 issue?
An unauthenticated attacker with network access to the affected Helidon Imperative Web Server over HTTP can exploit it. No user interaction or prior privileges are required.
What is the operational impact of a successful attack?
Successful exploitation can cause the Helidon service to hang or crash repeatedly, resulting in a complete denial of service. The provided impact information identifies availability impact only; no confidentiality or integrity impact is stated.
Which deployment should be prioritized for remediation?
Prioritize Oracle Helidon Imperative Web Server instances running the supported affected version, 4.5.1, especially where HTTP access is reachable by untrusted networks.