CVE-2026-21947

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{"analysis": {"en": {"generated_at": "2026-04-18T04:33:04.248825+00:00", "value": {"mitigation_remediation": ["Upgrade Oracle Java\u202fSE to the latest patch level that removes the JavaFX cross\u2011site scripting flaw, for example Java\u202fSE\u202f8u471\u2011b51 or newer.", "Disable or remove deprecated Java applets and Java Web\u202fStart from client environments that do not require them.", "Restrict client systems from loading untrusted Java content by enforcing strict browser policies or blocking internet access for JavaFX applications."], "summary": {"action": "Assess Impact", "impact": "Integrity compromise by unauthorized data modification"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Oracle\u202fJava\u202fSE 8u471\u2011b50, specifically the JavaFX component included in the JDK and JRE distributions. Client environments that run sandboxed Java Web\u202fStart applications or applets which load untrusted code from the internet are at risk. Deployments that use Java in server\u2011only trusted contexts are not impacted.", "description_and_impact": "The flaw is a cross\u2011site scripting weakness located within JavaFX, an out\u2011of\u2011box component of Oracle Java\u202fSE. An attacker can embed malicious code into a Java Web\u202fStart or applet image that, when executed by a victim, permits the attacker to update, insert or delete data that the Java runtime can access. Although the attack does not grant arbitrary code execution, it violates the integrity of client\u2011side data exposed by the Java application.", "risk_and_exploitability": "The CVSS base score of 3.1 classifies the flaw as Low, and the EPSS score of less than 1\u202f% indicates a very low likelihood of active exploitation. The vulnerability is not listed in the CISA KEV catalog, supporting its low exploitability. Exploitation requires an attacker to deliver malicious JavaFX content to a client and persuade a user to open it; even then the impact is limited to integrity violations rather than remote code execution."}}}}, "created": "2026-04-18T04:45:36.862050+00:00", "title": "Unauthenticated Integrity Compromise via JavaFX in Oracle Java SE 8u471-b50", "updated": "2026-04-18T04:45:36.862061+00:00", "vendors": []}