[ CVE-2026-91409 · Published 20 Oct 2026 ]
Vulnerability in Oracle Corporation Oracle Java SE
[ Description ]Official description
Vulnerability in Oracle Java SE (component: Networking). The supported version that is affected is Oracle Java SE: 27. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE. 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 3.7 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).
[ 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
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NCSC-NLNCSC-2026-0449
Multiple vulnerabilities fixed in Oracle Java Translated from Dutch
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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.
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BSI CERT-BundWID-SEC-2026-4079
Oracle Java SE: Multiple vulnerabilities Translated from German