Live › vulnerability › CVE-2026-91398
Go to dashboardOracle Java SE and GraalVM have a networking flaw in the SOCKS5 proxy handling that is hard to exploit. An unauthenticated attacker on the network can write or change data that the Java application 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.
Teams running the listed Oracle Java SE or GraalVM builds that use the networking APIs, especially code that connects through SOCKS5 proxies or accepts data from untrusted web services. Applications that do not use SOCKS5 and run only trusted code are less exposed. The advisory also mentions applets and Java Web Start for clients that run untrusted code.
No product ranges from the sources yet.
java -version and compare the output with the fixed releases listed in the Fix section.socksProxyHost or socksProxyPort system properties).8u503 or later (or the performance build 8u503-perf).11.0.32.1 or later.17.0.20.1 or later and Oracle GraalVM for JDK 17 to 17.0.20.1 or later.21.0.12.1 or later, Oracle Java SE 25 to 25.0.4.1 or later, and Oracle GraalVM Enterprise Edition 21 to 21.3.19.1.1 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, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). Supported versions that are affected are Oracle Java SE: 8u503, 8u503-perf, 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; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Difficult to exploit vulnerability allows unauthenticated attacker with network access via SOCKS5 to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. While the vulnerability is in Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition 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 6.8 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N).
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