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[ CVE-2026-91398 · Published 20 Oct 2026 ]

Vulnerability in Oracle Corporation Oracle Java SE

CVSS 6.8 EPSS <1%3 agency advisoriesNo fix listed yet

[ Description ]Official description

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).

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

  • NCSC-NLNCSC-2026-0449

    Multiple vulnerabilities fixed in Oracle Java Translated from Dutch

    Probability/damage M/HCVE-2026-6732CVE-2026-43660CVE-2026-46470+52 more CVEs
  • CERT-FRCERTFR-2026-AVI-1350

    Multiple vulnerabilities in Oracle Java SE Translated from French

    Multiple vulnerabilities have been discovered in Oracle Java SE. Some of them allow an attacker to cause remote arbitrary code execution, remote denial of service and a breach of data confidentiality.

    CVE-2026-91333CVE-2026-91335CVE-2026-28901+112 more CVEs
  • BSI CERT-BundWID-SEC-2026-4079

    Oracle Java SE: Multiple vulnerabilities Translated from German

    Risk mediumCVE-2026-91410CVE-2026-91333CVE-2026-91417+52 more CVEs

[ References ]References