CVE-2026-73920 Missing authorization in Helidon

Critical 9.4 Published 18 Aug 2026 Updated 28 Aug 2026

Unauthenticated attackers can read, modify, or delete critical data and cause partial denial of service in Helidon web servers.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-73920?

CVE-2026-73920 is a critical missing authorization vulnerability in Oracle Helidon, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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 creation, deletion or modification access to critical data or all Helidon accessible data as well as unauthorized access to critical data or complete access to all Helidon accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Helidon. CVSS 3.1 Base Score 9.4 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L).

Weakness: CWE-284

Which versions are affected by CVE-2026-73920?

It affects 1 product.

Products include Oracle Helidon.

How do I fix CVE-2026-73920?

No fix has been published for CVE-2026-73920 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-73920 being exploited?

There is no known exploitation of CVE-2026-73920 in the wild and no public exploit code.

All Oracle Helidon vulnerabilities

Sources

Also known as GHSA-pr65-82qp-rv35.