Live › vulnerability › CVE-2026-101588
Go to dashboardHelidon, Oracle's Java microservices framework, has a flaw in its WebSocket component that an unauthenticated attacker can reach over HTTP. A successful attack gives read access to a subset of data that Helidon can reach.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
Applications built on Helidon 4.0.0 through 4.5.5 or 27.0.0 that serve WebSocket endpoints over HTTP are exposed, since the attacker needs no account. Teams not running Helidon, or not serving WebSocket traffic, can skip it. The sources do not say which WebSocket paths or configurations trigger the flaw.
No product ranges from the sources yet.
4.0.0 through 4.5.5 or 27.0.04.0.0-4.5.5 and 27.0.0 (the fixed version is unknown from the sources)Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: WebSocket). 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 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).
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