Executive brief
Helidon is a Java-based web server framework used in Oracle Fusion Middleware deployments to host web applications. A privilege escalation vulnerability in the Imperative Web Server component allows a low-privileged authenticated user with network access to gain complete control over the Helidon server, compromising the confidentiality, integrity, and availability of hosted applications and data.
Technical details
This is a privilege escalation vulnerability in Oracle Helidon's Imperative Web Server component affecting versions 1.0.0–1.4.18 and 3.0.0–3.2.17. The vulnerability requires network access via HTTP and authentication as a low-privileged user, but has a high complexity barrier to exploitation (AC:H). A successful exploit allows an authenticated attacker to achieve complete server takeover with impacts to confidentiality, integrity, and availability. The specific attack vector, root cause, and patch availability are not disclosed in the advisory; users should consult Oracle's security updates for remediation guidance.
Affected products
- Oracle Helidon 1.0.0–1.4.18 and 3.0.0–3.2.17
Timeline
- 2026-08-18: disclosed