CVE-2026-73891: High severity Oracle Helidon vulnerability
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 4.0.0-4.4.1. 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 vulnerability?
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.
Which deployments are known to be affected?
The affected supported Helidon version identified in the advisory is 4.5.0, specifically the Imperative Web Server component. The provided information does not identify configuration-specific prerequisites.
What is the potential impact of a successful attack?
An attacker may gain unauthorized read access to a subset of Helidon-accessible data and unauthorized ability to update, insert, or delete some accessible data. Successful exploitation can also cause a partial denial of service.