CVE-2026-73933: High severity Oracle Helidon vulnerability
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 4.0.0-4.5.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Helidon accessible data as well as unauthorized read access to a subset of Helidon accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 7.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L).
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. The CVSS vector indicates low attack complexity and no user interaction requirement.
Which deployments are known to be affected?
The affected supported version identified is Oracle Helidon 4.5.3, specifically the Imperative Web Server component. Exposure requires that an attacker can reach the server over HTTP.
What could successful exploitation allow?
Successful exploitation can allow unauthorized read access to a subset of Helidon-accessible data and unauthorized update, insert, or delete operations on some accessible data. It can also cause a partial denial of service.