CVE-2026-21947Network attack vector

Data modification via undisclosed JavaFX input handling

Published Jan 20, 2026 · Updated Jan 20, 2026

Cross-site scripting in JavaFX in Oracle Java SE 8u471-b50 allows remote attackers to modify accessible data via untrusted code. Oracle has not published the affected JavaFX locus or the input-neutralization error that enables the cross-site scripting behavior. Exploitation requires user interaction and a sandboxed Java Web Start application or applet that loads untrusted code; server deployments that load only trusted code are outside the reported scope.

CVSS severity3.1
Low
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in JavaFX in Oracle Java SE 8u471-b50 allows remote attackers to modify accessible data via untrusted code. Oracle has not published the affected JavaFX locus or the input-neutralization error that enables the cross-site scripting behavior. Exploitation requires user interaction and a sandboxed Java Web Start application or applet that loads untrusted code; server deployments that load only trusted code are outside the reported scope.

The record

CVE
CVE-2026-21947
Published
Jan 20, 2026
Updated
Jan 20, 2026
Vendor
Oracle
Product
Java Platform, Standard Edition (Java SE)
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=8u471-b50

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Oracle · Java Platform, Standard Edition (Java SE)version=8u471-b50

Published CVSS scores

3.1OracleCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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