Description
Vulnerability in the Oracle Java SE, Oracle JavaFX, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JavaFX). Supported versions that are affected are Oracle Java SE: 8u503; Oracle JavaFX: 21.0.12, 25.0.4 and 27; 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 JavaFX, Oracle GraalVM Enterprise Edition. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE, Oracle JavaFX, Oracle GraalVM Enterprise Edition accessible data as well as unauthorized read access to a subset of Oracle Java SE, Oracle JavaFX, Oracle GraalVM Enterprise Edition 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 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N).
Published: 2026-10-20
Score: 5.4 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Unauthorized data modification and partial disclosure
Action: Patch
AI Analysis

Impact

A flaw in the JavaFX sandbox permits an unauthenticated attacker with network access to manipulate or read data when a user interacts with a sandboxed Java Web Start application or applet that loads untrusted code. The problem manifests as the ability to update, insert or delete data, and to read a subset of accessible data, thereby compromising both confidentiality and integrity of the affected Java runtime components.

Affected Systems

The affected products are Oracle Java SE 8u503, Oracle JavaFX versions 21.0.12, 25.0.4 and 27, and Oracle GraalVM Enterprise Edition 21.3.19.1.1. The vulnerability is relevant to client deployments that run sandboxed Java Web Start applications or applets, and does not affect server deployments that run only trusted code.

Risk and Exploitability

The flaw has a CVSS 3.1 base score of 5.4 with an AV:N, AC:L, PR:N, UI:R, S:U, C:L, I:L vector. Exploitation can be executed over the network through several protocols but requires user interaction with the affected application to trigger the attack. The EPSS score is less than 1%, and the vulnerability is not listed in the CISA KEV catalog, indicating a moderate but not immediate threat level.

Generated by OpenCVE AI on October 22, 2026 at 07:47 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest Oracle patch updates for Java SE, JavaFX, and GraalVM as recommended in the Oracle CPU Oct 2026 advisory
  • Configure the Java runtime to disable sandboxed Java Web Start applications and Java applets, or restrict the runtimes to allow only trusted code
  • If immediate patching is not possible, limit exposure by disabling JavaFX features in the application or restricting network access for untrusted code

Generated by OpenCVE AI on October 22, 2026 at 07:47 UTC.

Tracking

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Advisories

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History

Thu, 22 Oct 2026 08:15:00 +0000

Type Values Removed Values Added
Title Unauthorized Data Modification via JavaFX Sandbox

Thu, 22 Oct 2026 01:30:00 +0000

Type Values Removed Values Added
Title Unauthorized Data Modification via JavaFX Sandbox

Wed, 21 Oct 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Oracle graalvm Enterprise Edition
Oracle oracle Java Se
Vendors & Products Oracle graalvm Enterprise Edition
Oracle oracle Java Se

Wed, 21 Oct 2026 23:30:00 +0000

Type Values Removed Values Added
Title JavaFX Sandbox Escalation Allowing Unauthorized Data Access
Weaknesses CWE-200
CWE-285

Wed, 21 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 21 Oct 2026 09:45:00 +0000

Type Values Removed Values Added
Title JavaFX Sandbox Escalation Allowing Unauthorized Data Access
Weaknesses CWE-200
CWE-285

Tue, 20 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Description Vulnerability in the Oracle Java SE, Oracle JavaFX, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JavaFX). Supported versions that are affected are Oracle Java SE: 8u503; Oracle JavaFX: 21.0.12, 25.0.4 and 27; 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 JavaFX, Oracle GraalVM Enterprise Edition. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE, Oracle JavaFX, Oracle GraalVM Enterprise Edition accessible data as well as unauthorized read access to a subset of Oracle Java SE, Oracle JavaFX, Oracle GraalVM Enterprise Edition 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 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N).
First Time appeared Oracle
Oracle graalvm
Oracle java Se
Oracle javafx
CPEs cpe:2.3:a:oracle:graalvm:21.3.19.1.1:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:java_se:8u503:*:*:*:*:*:*:*
cpe:2.3:a:oracle:javafx:21.0.12:*:*:*:*:*:*:*
cpe:2.3:a:oracle:javafx:25.0.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:javafx:27:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle graalvm
Oracle java Se
Oracle javafx
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}

Subscriptions

Oracle Graalvm Graalvm Enterprise Edition Java Se Javafx Oracle Java Se
cve-icon MITRE

Status: PUBLISHED

Assigner: oracle

Published:

Updated: 2026-10-21T15:25:34.101Z

Reserved: 2026-09-14T22:10:16.631Z

Link: CVE-2026-91385

cve-icon Vulnrichment

Updated: 2026-10-21T15:25:29.944Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T22:20:41.700

Modified: 2026-10-21T18:45:11.277

Link: CVE-2026-91385

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T08:00:04Z

Weaknesses