Vulnerability in Oracle Java SE (component: Security). Supported versions that are affected are Oracle Java SE: 21.0.12.1, 25.0.4.1 and 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 update, insert or delete access to some of Oracle Java SE 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 3.7 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N).

A flaw was found in the Security component of Oracle Java SE. An unauthenticated remote attacker with network access could exploit this flaw by supplying crafted input to exposed application programming interfaces (APIs) or by executing untrusted code within sandboxed environments. A successful attack allows the adversary to perform unauthorized data modifications, including inserting, updating, or deleting accessible records.

This vulnerability is rated with a Low severity impact because successful exploitation requires high attack complexity and only permits limited integrity modifications without compromising confidentiality or system availability. In typical Red Hat deployments, Java applications do not run untrusted code under a security sandbox, and exploitation through exposed network APIs depends on specific, complex cryptographic operations processing attacker-controlled data. Furthermore, earlier supported releases such as OpenJDK 8, 11, and 17 do not contain the affected code. Red Hat Build of OpenJDK 21.0.12.1 2026-10-29T00:00:00Z RHSA-2026:88350 java-21-openjdk-portable Red Hat Build of OpenJDK 21.0.13 2026-10-29T00:00:00Z RHSA-2026:88351 java-21-openjdk-windows Red Hat Build of OpenJDK 25.0.5 2026-10-29T00:00:00Z RHSA-2026:88348 java-25-openjdk-portable Red Hat Enterprise Linux 10 2026-10-27T00:00:00Z RHSA-2026:88347 java-25-openjdk-1:25.0.5.0.8-1.0.el10 Red Hat Enterprise Linux 10 2026-10-29T00:00:00Z RHSA-2026:90504 java-21-openjdk-1:21.0.13.0.9-1.2.el10 Red Hat Enterprise Linux 10.0 Extended Update Support 2026-10-29T00:00:00Z RHSA-2026:90504 java-21-openjdk-1:21.0.13.0.9-1.1.el10 Red Hat Enterprise Linux 8 2026-10-30T00:00:00Z RHSA-2026:88349 java-21-openjdk-1:21.0.13.0.9-1.1.el8 Red Hat Enterprise Linux 9 2026-10-27T00:00:00Z RHSA-2026:88347 java-25-openjdk-1:25.0.5.0.8-1.0.el9 Red Hat Enterprise Linux 9 2026-10-30T00:00:00Z RHSA-2026:88349 java-21-openjdk-1:21.0.13.0.9-1.2.el9 Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 2026-10-30T00:00:00Z RHSA-2026:88349 java-21-openjdk-1:21.0.13.0.9-1.1.el9 Red Hat Enterprise Linux 9.6 Extended Update Support 2026-10-30T00:00:00Z RHSA-2026:88349 java-21-openjdk-1:21.0.13.0.9-1.1.el9 Temurin Build of OpenJDK 25.0.4.1 2026-10-29T00:00:00Z RHSA-2026:90912 java-25-openjdk-windows Red Hat Hardened Images 2026-11-02T00:00:00Z RHSA-2026:94069 java-21-openjdk-portable-main-21.0.13.0.9-1.0.1.hum1 Red Hat Hardened Images 2026-11-02T00:00:00Z RHSA-2026:94111 java-25-openjdk-portable-main-25.0.5.0.8-3.0.hum1 Red Hat Hardened Images 2026-11-03T00:00:00Z RHSA-2026:94625 java-25-openjdk-main-25.0.5.0.8-3.1.hum1 Red Hat build of OpenJDK 11 ELS Not affected java-11-openjdk Red Hat build of OpenJDK 11 ELS Not affected java-11-openjdk-portable Red Hat build of OpenJDK 11 ELS Not affected java-11-openjdk-windows Red Hat build of OpenJDK 17 Not affected java-17-openjdk-portable Red Hat build of OpenJDK 17 Not affected java-17-openjdk-windows Red Hat build of OpenJDK 1.8 Not affected java-1.8.0-openjdk-portable Red Hat build of OpenJDK 1.8 Not affected java-1.8.0-openjdk-windows Red Hat Enterprise Linux 10 Affected java-21-ibm-semeru-certified-jdk Red Hat Enterprise Linux 6 Out of support scope java-1.6.0-openjdk Red Hat Enterprise Linux 6 Out of support scope java-1.7.0-openjdk Red Hat Enterprise Linux 6 Out of support scope java-1.8.0-openjdk Red Hat Enterprise Linux 7 Out of support scope java-1.6.0-openjdk Red Hat Enterprise Linux 7 Out of support scope java-1.7.0-openjdk Red Hat Enterprise Linux 7 Not affected java-1.8.0-openjdk Red Hat Enterprise Linux 8 Not affected java-17-openjdk Red Hat Enterprise Linux 8 Not affected java-1.8.0-ibm Red Hat Enterprise Linux 8 Not affected java-1.8.0-openjdk Red Hat Enterprise Linux 9 Not affected java-17-openjdk Red Hat Enterprise Linux 9 Not affected java-1.8.0-openjdk Red Hat Hardened Images Not affected java-17-openjdk-portable Red Hat Hardened Images Affected java-21-openjdk https://www.cve.org/CVERecord?id=CVE-2026-91333 https://nvd.nist.gov/vuln/detail/CVE-2026-91333 https://www.oracle.com/security-alerts/cpuoct2026.html