CVE-2026-21947: 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 update, insert or delete access to some of Oracle Java SE accessible data. in Oracle Corporation Oracle Java SE
Vulnerability in Oracle Java SE (component: JavaFX). Supported versions that are affected are Oracle Java SE: 8u471-b50. 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 update, insert or delete access to some 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 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N).
AI Analysis
Technical Summary
CVE-2026-21947 is a vulnerability in the JavaFX component of Oracle Java SE version 8u471-b50. It permits an unauthenticated attacker with network access via multiple protocols to compromise the product by performing unauthorized update, insert, or delete actions on data accessible through Java SE. Successful exploitation requires user interaction from someone other than the attacker. The vulnerability affects client-side Java environments that run untrusted code relying on the Java sandbox for security, such as sandboxed Java Web Start applications or applets. Server-side Java deployments running only trusted code are not affected. The CVSS 3.1 vector indicates network attack vector, high attack complexity, no privileges required, required user interaction, unchanged scope, no confidentiality impact, low integrity impact, and no availability impact. Oracle’s January 2026 Critical Patch Update advisory references this vulnerability among many others but does not explicitly confirm a dedicated patch for this specific CVE in the provided content.
Potential Impact
The impact of CVE-2026-21947 is limited to unauthorized modification (update, insert, or delete) of some data accessible via Oracle Java SE in affected client-side deployments. There is no impact on confidentiality or availability. The vulnerability requires network access and user interaction, making exploitation difficult. It does not affect server-side Java deployments running trusted code. The CVSS score of 3.1 reflects a low severity level focused on integrity impact only.
Mitigation Recommendations
Oracle’s January 2026 Critical Patch Update advisory includes this vulnerability among many others. While no specific patch link for CVE-2026-21947 was provided in the input data, Oracle strongly recommends applying the latest Critical Patch Update security patches promptly to address this and other vulnerabilities. Customers should ensure they are running actively supported versions of Oracle Java SE and apply all relevant patches from the January 2026 CPU. Since the vulnerability requires user interaction, educating users to avoid interacting with untrusted Java content can reduce risk. Patch status is not yet confirmed explicitly for this CVE in the advisory content provided; therefore, check the Oracle advisory at https://www.oracle.com/security-alerts/cpujan2026.html for the latest remediation guidance.
CVE-2026-21947: 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 update, insert or delete access to some of Oracle Java SE accessible data. in Oracle Corporation Oracle Java SE
Description
Vulnerability in Oracle Java SE (component: JavaFX). Supported versions that are affected are Oracle Java SE: 8u471-b50. 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 update, insert or delete access to some 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 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N).
CVSS v3.1
Score 3.1low
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-21947 is a vulnerability in the JavaFX component of Oracle Java SE version 8u471-b50. It permits an unauthenticated attacker with network access via multiple protocols to compromise the product by performing unauthorized update, insert, or delete actions on data accessible through Java SE. Successful exploitation requires user interaction from someone other than the attacker. The vulnerability affects client-side Java environments that run untrusted code relying on the Java sandbox for security, such as sandboxed Java Web Start applications or applets. Server-side Java deployments running only trusted code are not affected. The CVSS 3.1 vector indicates network attack vector, high attack complexity, no privileges required, required user interaction, unchanged scope, no confidentiality impact, low integrity impact, and no availability impact. Oracle’s January 2026 Critical Patch Update advisory references this vulnerability among many others but does not explicitly confirm a dedicated patch for this specific CVE in the provided content.
Potential Impact
The impact of CVE-2026-21947 is limited to unauthorized modification (update, insert, or delete) of some data accessible via Oracle Java SE in affected client-side deployments. There is no impact on confidentiality or availability. The vulnerability requires network access and user interaction, making exploitation difficult. It does not affect server-side Java deployments running trusted code. The CVSS score of 3.1 reflects a low severity level focused on integrity impact only.
Mitigation Recommendations
Oracle’s January 2026 Critical Patch Update advisory includes this vulnerability among many others. While no specific patch link for CVE-2026-21947 was provided in the input data, Oracle strongly recommends applying the latest Critical Patch Update security patches promptly to address this and other vulnerabilities. Customers should ensure they are running actively supported versions of Oracle Java SE and apply all relevant patches from the January 2026 CPU. Since the vulnerability requires user interaction, educating users to avoid interacting with untrusted Java content can reduce risk. Patch status is not yet confirmed explicitly for this CVE in the advisory content provided; therefore, check the Oracle advisory at https://www.oracle.com/security-alerts/cpujan2026.html for the latest remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- oracle
- Date Reserved
- 2026-01-05T18:07:34.712Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.oracle.com/security-alerts/cpujan2026.html","vendor":"Oracle"}]
Threat ID: 696ffc4a4623b1157c519f8f
Added to database: 01/20/2026, 22:06:02 UTC
Last enriched: 05/13/2026, 02:39:25 UTC
Last updated: 09/10/2026, 19:24:58 UTC
Views: 265
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.