CVE-2026-73930: Critical severity Oracle Helidon vulnerability
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: Imperative Web Server). Supported versions that are affected are 3.0.0-3.2.19 and 4.0.0-4.5.2. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. While the vulnerability is in Helidon, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all 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 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/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 can exploit it via HTTP. No user interaction or prior privileges are required.
Which deployment is confirmed affected?
Oracle identifies Helidon version 4.5.3 as the supported affected version, specifically the Imperative Web Server component.
What could a successful attack allow?
An attacker could create, delete, or modify critical data or all data accessible to Helidon, read a subset of Helidon-accessible data, and cause a partial denial of service. The scope change indicates attacks may also significantly affect additional products.