Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JAAS). 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 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 5.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

A flaw was found in OpenJDK within the Java Authentication and Authorization Service (JAAS) component. An unauthenticated remote attacker can exploit this vulnerability over a network by sending data to affected application programming interfaces (APIs). Successful exploitation results in information disclosure, granting unauthorized read access to a subset of accessible data.

This vulnerability is rated as Moderate because exploitation is limited to partial information disclosure without compromising system integrity or service availability. For Red Hat environments, exposure is restricted to applications that accept external user inputs and process them through the OpenJDK JAAS LDAP authentication modules. Workloads that do not utilize JAAS for directory service logins or that sanitize input prior to authentication calls are not exposed to this risk. 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 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 Affected java-11-openjdk Red Hat build of OpenJDK 11 ELS Affected java-11-openjdk-portable Red Hat build of OpenJDK 11 ELS Affected java-11-openjdk-windows 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 Red Hat Hardened Images Affected java-21-openjdk https://www.cve.org/CVERecord?id=CVE-2026-83380 https://nvd.nist.gov/vuln/detail/CVE-2026-83380 https://www.oracle.com/security-alerts/cpuoct2026.html