CVE-2026-101572

High

Description

Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webclient-http2). Supported versions that are affected are 4.0.0-4.5.5 and 27.0.0. 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).

SeverityHigh

CVSS7.5

Exploit probability—

ProductHelidon

PublishedOct 20, 2026

First seenOct 20, 2026

Weakness typeCWE-400Uncontrolled resource consumption

How to fix

Vendor advisories

oracle.com/security-alerts/cpuoct2026.html

Affected products

Product	Affected versions	Fixed in
Oracle Corporation Helidon	4.0.0 ≤ v ≤ 4.5.5, 27.0.0	—

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