CVE-2026-73883 Information disclosure in Helidon

High 7.5 Published 18 Aug 2026 Updated 28 Aug 2026

Unauthenticated attackers can access critical data via HTTP in Helidon, requiring an upgrade to secure the server.

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-2026-73883?

CVE-2026-73883 is a high-severity 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 3.0.0-3.2.17. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Helidon accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Weakness: CWE-200

Which versions are affected by CVE-2026-73883?

It affects 1 product.

Products include Oracle Helidon.

How do I fix CVE-2026-73883?

No fix has been published for CVE-2026-73883 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-73883 being exploited?

There is no known exploitation of CVE-2026-73883 in the wild and no public exploit code.

All Oracle Helidon vulnerabilities

Sources

Also known as GHSA-34mp-p83h-rqw5.