CVE-2026-91484
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk1th percentile - higher than 1% of all known CVEs
Summary
Vulnerability in the Java plugin component of Oracle Java SE (versions 8u503 and 8u503-perf). A low privileged attacker with local logon can gain unauthorized creation, deletion or modification access to critical data and full access to Java SE data; exploitation is difficult and impact may extend beyond Java SE (scope change). Applies to clients running untrusted code in the sandbox (e.g., applets, Web Start). CVSS 7.5.
Risk Assessment
Potential compromise of confidentiality and integrity of data and related systems if users run untrusted Java code in browsers or clients.
Recommendation
Apply the Oracle Critical Patch Update for Java SE 8u503 and 8u503-perf, and disable or restrict execution of untrusted applets and Web Start applications.
Other vulnerabilities in Oracle Java SE
See all- CVE-2026-91382Medium
Vulnerability in Oracle Java SE, Oracle GraalVM for JDK and Oracle GraalVM Enterprise Edition (component: 2D) affecting versions such as 8u503, 11.0.32.1, 17.0.20.1, 21.0.12.1 and 21.3.19.1.1. A difficult-to-exploit flaw allows an unauthenticated attacker with network access via multiple protocols to impact data integrity and cause partial denial of service.
- CVE-2026-91381Low
Vulnerability in Oracle Java SE and Oracle GraalVM Enterprise Edition (2D component) affecting versions 8u503, 8u503-perf, and 21.3.19.1.1. A difficult-to-exploit flaw allows an unauthenticated network attacker to modify, insert, or delete some data; also applies to sandboxed Java Web Start/applet deployments.
- CVE-2026-91380Medium
Vulnerability in the Utility component of Oracle Java SE, Oracle GraalVM for JDK, and Oracle GraalVM Enterprise Edition. This difficult-to-exploit flaw allows an unauthenticated attacker with logon access to the infrastructure to gain unauthorized update, insert, or delete access and unauthorized read access to a subset of data. It can be exploited through APIs in the component, e.g., via a web service supplying data, and also affects Java deployments running untrusted code in a sandbox.
- CVE-2026-91379Medium
Vulnerability in Oracle Java SE, Oracle GraalVM for JDK and Oracle GraalVM Enterprise Edition (component: JDK tools) affecting versions such as 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1 and 27. A difficult-to-exploit flaw requires logon to the infrastructure and human interaction and can lead to unauthorized data modification.
- CVE-2026-91375Medium
Vulnerability in Oracle Java SE Libraries component involves difficult-to-exploit attacks requiring logon to the infrastructure and user interaction. Successful exploitation may allow unauthorized creation, deletion, or modification of critical data.
- CVE-2026-91374Medium
Vulnerability in the Serviceability component of Oracle Java SE, GraalVM for JDK, and GraalVM Enterprise Edition allows a difficult-to-exploit network attack. It may result in unauthorized update, insert, or delete access to some data and unauthorized read access to a subset of data.
- CVE-2026-101516Medium
Vulnerability in Oracle Java SE, Oracle GraalVM for JDK and Oracle GraalVM Enterprise Edition (component: Libraries) affects multiple supported versions. An easily exploitable flaw allows an unauthenticated attacker with network access via multiple protocols to perform unauthorized update, insert or delete access to some data and unauthorized read access to a subset of data.
- CVE-2016-3552High
Unspecified vulnerability in Oracle Java SE 8u92 allows local users to affect confidentiality, integrity, and availability via vectors related to Install.
- CVE-2016-3449High
Unspecified vulnerability in Oracle Java SE 6u113, 7u99, and 8u77 allows remote attackers to affect confidentiality, integrity, and availability via vectors related to Deployment.
- CVE-2015-4901High
An unspecified vulnerability in Oracle Java SE 8u60 allows remote attackers to affect confidentiality, integrity, and availability via unknown vectors related to JavaFX.
Original NVD description (English source)
Vulnerability in Oracle Java SE (component: Java plugin). Supported versions that are affected are Oracle Java SE: 8u503 and 8u503-perf. Difficult to exploit vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Java SE executes to compromise Oracle Java SE. While the vulnerability is in Oracle Java SE, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Java SE accessible data as well as unauthorized access to critical data or complete access to all Oracle Java SE accessible data. Note: This vulnerability 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. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.1 Base Score 7.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N).
Vulnerability data from NVD (NIST) · CISA KEV · EPSS