Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Security). 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. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data as well as unauthorized read access to a subset of 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 6.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N).

A flaw was found in OpenJDK. An unauthenticated remote attacker can exploit this issue across multiple network protocols by submitting crafted requests to application programming interfaces (APIs) within the Security component. Successful exploitation allows an attacker to modify or delete accessible application data, as well as gain unauthorized read access to sensitive information.

This vulnerability is rated Moderate because, although it can be triggered over the network without authentication, the scope of impact is restricted to partial confidentiality and integrity compromise of data handled by the running Java process rather than complete system takeover. Enterprise deployments of Red Hat products running OpenJDK services are primarily at risk when applications process untrusted network traffic and rely on the core Security component for certificate name verification. Applications that do not accept external connections or perform custom certificate validation remain unaffected by this flaw. OPENJDK ELS 11.0.33 2026-11-05T00:00:00Z RHSA-2026:94499 java-11-openjdk-portable OPENJDK ELS 11.0.33 2026-11-05T00:00:00Z RHSA-2026:95273 java-11-openjdk-windows Red Hat Build of OpenJDK 17.0.20.1 2026-10-27T00:00:00Z RHSA-2026:89916 java-17-openjdk-windows Red Hat Build of OpenJDK 17.0.21 2026-10-27T00:00:00Z RHSA-2026:88353 java-17-openjdk-portable 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 8 2026-10-27T00:00:00Z RHSA-2026:88352 java-17-openjdk-1:17.0.21.0.9-2.1.el8 Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 2026-10-27T00:00:00Z RHSA-2026:88352 java-17-openjdk-1:17.0.21.0.9-2.1.el8 Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 2026-10-27T00:00:00Z RHSA-2026:88352 java-17-openjdk-1:17.0.21.0.9-2.1.el8 Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 2026-10-27T00:00:00Z RHSA-2026:88352 java-17-openjdk-1:17.0.21.0.9-2.1.el8 Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 2026-10-27T00:00:00Z RHSA-2026:88352 java-17-openjdk-1:17.0.21.0.9-2.1.el8 Red Hat Enterprise Linux 8.8 Telecommunications Update Service 2026-10-27T00:00:00Z RHSA-2026:88352 java-17-openjdk-1:17.0.21.0.9-2.1.el8 Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 2026-10-27T00:00:00Z RHSA-2026:88352 java-17-openjdk-1:17.0.21.0.9-2.1.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 2026-10-31T00:00:00Z RHSA-2026:90500 java-17-openjdk-1:17.0.21.0.9-2.2.el9 Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 2026-10-31T00:00:00Z RHSA-2026:90500 java-17-openjdk-1:17.0.21.0.9-2.1.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 9.4 Update Services for SAP Solutions 2026-10-31T00:00:00Z RHSA-2026:90500 java-17-openjdk-1:17.0.21.0.9-2.1.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 Red Hat Enterprise Linux 9.6 Extended Update Support 2026-10-31T00:00:00Z RHSA-2026:90500 java-17-openjdk-1:17.0.21.0.9-2.1.el9 Red Hat OpenJDK 11 els for RHEL 7 2026-11-05T00:00:00Z RHSA-2026:94520 java-11-openjdk-1:11.0.33.0.10-1.el7_9 Red Hat OpenJDK 11 els for RHEL 8 2026-11-05T00:00:00Z RHSA-2026:94520 java-11-openjdk-1:11.0.33.0.10-1.el8 Red Hat OpenJDK 11 els for RHEL 9 2026-11-05T00:00:00Z RHSA-2026:94520 java-11-openjdk-1:11.0.33.0.10-1.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-2026:94403 java-21-openjdk-main-21.0.13.0.9-0.1.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 1.8 Affected java-1.8.0-openjdk-portable Red Hat build of OpenJDK 1.8 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 Affected java-1.8.0-openjdk Red Hat Enterprise Linux 8 Affected java-1.8.0-ibm Red Hat Enterprise Linux 8 Affected java-1.8.0-openjdk Red Hat Enterprise Linux 9 Affected java-1.8.0-openjdk Red Hat Hardened Images Not affected hi/openjdk Red Hat Hardened Images Affected java-17-openjdk-portable https://www.cve.org/CVERecord?id=CVE-2026-87294 https://nvd.nist.gov/vuln/detail/CVE-2026-87294 https://www.oracle.com/security-alerts/cpuoct2026.html