CVE-2026-73889 Information disclosure in Helidon

What is CVE-2026-73889?

CVE-2026-73889 is a medium-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 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 read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

Weakness: CWE-284

Which versions are affected by CVE-2026-73889?

It affects 1 product.

Products include Oracle Helidon.

How do I fix CVE-2026-73889?

No fix has been published for CVE-2026-73889 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-73889 being exploited?

There is no known exploitation of CVE-2026-73889 in the wild and no public exploit code.

Other vulnerabilities in Oracle Helidon

• CVE-2026-73930 Missing authorization in Helidon Critical 9.9
• CVE-2026-71074 Auth bypass in Helidon Critical 9.8
• CVE-2026-71152 Auth bypass in Helidon Critical 9.8
• CVE-2026-71164 Auth bypass in Helidon Critical 9.8
• CVE-2026-73905 Auth bypass in Helidon Critical 9.8

All Oracle Helidon vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-g523-9v8v-25c9.