CVE-2026-71160 Auth bypass in Helidon

High 7.5 Published 18 Aug 2026 Updated 28 Aug 2026

A low-privileged attacker can compromise the Helidon web server via HTTP, leading to full system takeover.

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

What is CVE-2026-71160?

CVE-2026-71160 is a high-severity authentication bypass vulnerability in Oracle Helidon, published on 18 Aug 2026. Any signed-in user can exploit it over the network, 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 1.0.0-1.4.18 and 3.0.0-3.2.17. Difficult to exploit vulnerability allows low privileged 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 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).

Weakness: CWE-284

Which versions are affected by CVE-2026-71160?

It affects 1 product.

Products include Oracle Helidon.

How do I fix CVE-2026-71160?

No fix has been published for CVE-2026-71160 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-2026-71160 being exploited?

There is no known exploitation of CVE-2026-71160 in the wild and no public exploit code.

All Oracle Helidon vulnerabilities

Sources

Also known as GHSA-hpv5-9559-pc8j.