What is CVE-2026-83276?

CVE-2026-83276 is a high-severity vulnerability in Oracle Corporation Helidon, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-09-15.

How severe is CVE-2026-83276?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Oracle Corporation Helidon

CVE-2026-83276

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webclient-http2). Supported versions that are affected are 4.0.0-4.5.4. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Helidon. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Vulnerability class: DoS (Denial of Service)

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Oracle Corporation Helidon

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

secalert_us@oracle.com (vendor-advisory)

Frequently asked questions

What is CVE-2026-83276?: CVE-2026-83276 is a high-severity vulnerability in Oracle Corporation Helidon, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-09-15.
How severe is CVE-2026-83276?: High severity. CVSS v3 base score is 7.5 out of 10.