Live › vulnerability › CVE-2026-91394
Go to dashboardA flaw in the Networking component of Oracle Java SE and Oracle GraalVM for JDK lets an unauthenticated attacker with network access read sensitive data from a Java application. Exploitation is difficult and can run through a web service that passes data into the affected APIs.
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.
Any application running an affected Oracle Java SE or GraalVM for JDK release is exposed if it passes network-supplied data into the vulnerable Networking APIs, for example through a web service. Client machines running sandboxed Java Web Start or applet code that loads untrusted code are also named in the sources. Teams on unaffected versions, or that do not expose these APIs to untrusted input, have less to do.
No product ranges from the sources yet.
java -version and compare against the affected releases: Java SE 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27, and GraalVM for JDK 17.0.20.1 and 21.0.12.1.11.0.32.1, 17.0.20.1, 21.0.12.1, or 25.0.4.1, or to a release that includes the fix.17.0.20.1 or 21.0.12.1 or later.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK product of Oracle Java SE (component: Networking). Supported versions that are affected are Oracle Java SE: 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27; Oracle GraalVM for JDK: 17.0.20.1 and 21.0.12.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Java SE, Oracle GraalVM for JDK accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 5.9 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).
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