CVE-2026-101587: Medium severity Oracle Helidon vulnerability
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webclient-http1). Supported versions that are affected are 4.0.0-4.5.5 and 27.0.0. 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 partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).
Affected Software
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
Oracle Helidon deployments using the helidon-webclient-http1 component are affected if they run supported versions 4.0.0 through 4.5.5, or version 27.0.0. Network reachability over HTTP is required.
Does an attacker need credentials or user interaction?
No. The vulnerability is described as easily exploitable by an unauthenticated attacker with network access via HTTP, and it requires no user interaction.
What is the expected impact of successful exploitation?
Successful exploitation can allow an attacker to cause a partial denial of service affecting Helidon. The stated CVSS impact is limited to availability; no confidentiality or integrity impact is identified.