CVE-2026-73912 Auth bypass in Helidon

Critical 9.8 Published 18 Aug 2026 Updated 27 Aug 2026

Unauthenticated attackers can compromise the Helidon web server via HTTP, leading to full system takeover.

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-2026-73912?

CVE-2026-73912 is a critical authentication bypass 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 takeover of Helidon. CVSS 3.1 Base Score 9.8 (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:H).

Weakness: CWE-284

Which versions are affected by CVE-2026-73912?

It affects 1 product.

Products include Oracle Helidon.

How do I fix CVE-2026-73912?

No fix has been published for CVE-2026-73912 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-73912 being exploited?

There is no known exploitation of CVE-2026-73912 in the wild and no public exploit code.

All Oracle Helidon vulnerabilities

Sources

Also known as GHSA-f57v-xr52-p9g9.