CVE-2026-73929: 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 4.0.0-4.5.2. 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 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 8.3 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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 deployment is known to be affected?
Oracle identifies Helidon Imperative Web Server version 4.5.3 as the supported affected version. The provided information does not identify configuration-specific prerequisites.
What could a successful attack allow?
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. A successful attack can also cause a partial denial of service, and may significantly affect additional products because the scope changes.