Severity by source
AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Network delivery requires victim interaction with malicious JavaFX content; high complexity; limited confidentiality read only with no integrity or availability impact.
Primary rating from Vendor (oracle).
CVSS VectorVendor: oracle
Lifecycle Timeline
1DescriptionCVE.org
Vulnerability in Oracle Java SE (component: JavaFX). The supported version that is affected is Oracle Java SE: 8u491. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized read access to a subset of 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 3.1 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N).
AnalysisAI
Unauthorized data read in the JavaFX component of Oracle Java SE 8u491 allows a remote unauthenticated attacker to access a subset of Oracle Java SE data by luring a victim into interacting with a malicious sandboxed Java Web Start application or Java applet. The attack is constrained exclusively to client-side Java deployments that run untrusted code within the Java sandbox, with high exploitation complexity (AC:H) and mandatory user interaction (UI:R) further limiting real-world reach. No public exploit code and no CISA KEV listing have been identified at time of analysis; the CVSS 3.1 score of 3.1 (Low) accurately reflects the narrow, confidentiality-only impact.
Technical ContextAI
The vulnerability resides in JavaFX, Oracle's graphical UI and media framework bundled with legacy Java SE 8 distributions. The attack surface is narrowly confined to sandboxed Java execution environments - specifically Java Web Start (JWS) applications and browser-embedded Java applets that load and execute untrusted code downloaded from the internet, relying on the Java security sandbox as their primary isolation boundary. Server-side Java deployments executing only administrator-installed trusted code are explicitly out of scope per Oracle's advisory. The CWE classification is not assigned in available data, but the 'Authentication Bypass' tag in combination with the sandbox-scoped description strongly suggests a security control bypass within the JavaFX component that allows sandboxed, untrusted code to read data it should be denied access to. The affected CPE is cpe:2.3:a:oracle_corporation:oracle_java_se:*:*:*:*:*:*:*:*, specific to version 8u491.
RemediationAI
Apply the patch released as part of the Oracle Critical Patch Update July 2026, available via the advisory at https://www.oracle.com/security-alerts/cpujul2026.html. The exact patched version number is not independently specified in available intelligence beyond the advisory reference - consult Oracle's CPU directly to confirm the target upgrade version for Java SE 8. As a compensating control, organizations should disable Java Web Start and Java applet support entirely in any client runtime configurations, as these legacy technologies constitute the exclusive attack surface for this vulnerability; disabling them has no functional impact on modern Java applications and server workloads. Organizations running Java SE exclusively in server configurations with trusted code require no action. Given Java 8u491 is a legacy extended-support release, evaluating migration to a supported Java SE LTS release (Java 21 or Java 25) is strongly advisable for reducing ongoing exposure.
Oracle Java SE 7 Update 6 and earlier contains multiple sandbox bypass vulnerabilities via the ClassFinder and forName m
Remote code execution in IBM Sterling B2B Integrator, Sterling Integrator, and Tivoli Common Reporting allows unauthenti
Java Runtime Environment sandbox bypass via incorrect image channel verification in 2D component allows remote unauthent
Oracle Java SE JDK/JRE 7 and 6 Update 27 and earlier allows remote code execution with complete system compromise throug
JBoss Seam 2 in Red Hat JBoss EAP 4.3.0 fails to sanitize JBoss Expression Language inputs, allowing remote attackers to
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 update 4 and earlier, 6 up
Multiple vulnerabilities in Oracle Java 7 before Update 11 allow remote attackers to execute arbitrary code by (1) using
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 2 and earlier, 6 Up
The WLS Security component in Oracle WebLogic Server 10.3.6.0, 12.1.2.0, 12.1.3.0, and 12.2.1.0 allows remote attackers
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 7 and earlier allow
Remote unauthenticated attackers can execute arbitrary code on Adobe ColdFusion servers through Java deserialization fla
The ExceptionDelegator component in Apache Struts before 2.2.3.1 interprets parameter values as OGNL expressions during
Same weakness CWE-693 – Protection Mechanism Failure
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today
EUVD-2026-46570
GHSA-6vj8-6725-cqvx