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).
History

Fri, 23 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-400
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 22 Oct 2026 14:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-730

Thu, 22 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Title Oracle Java SE 27 Denial of Service via Networking Component openjdk: Enhance QUIC connections (Oracle CPU 2026-10)
Weaknesses CWE-770
References
Metrics threat_severity

None

threat_severity

Low


Wed, 21 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Oracle oracle Java Se
Vendors & Products Oracle oracle Java Se

Wed, 21 Oct 2026 10:45:00 +0000

Type Values Removed Values Added
Title Oracle Java SE 27 Denial of Service via Networking Component
Weaknesses CWE-730

Tue, 20 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
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).
First Time appeared Oracle
Oracle java Se
CPEs cpe:2.3:a:oracle:java_se:27:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle java Se
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published: 2026-10-20T21:25:48.786Z

Updated: 2026-10-23T19:56:25.258Z

Reserved: 2026-09-14T22:10:16.633Z

Link: CVE-2026-91409

cve-icon Vulnrichment

Updated: 2026-10-23T19:56:19.331Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T22:20:44.260

Modified: 2026-10-23T20:17:29.230

Link: CVE-2026-91409

cve-icon Redhat

Severity : Low

Publid Date: 2026-10-20T21:25:48Z

Links: CVE-2026-91409 - Bugzilla