CVE-2026-91477 (CVSS 3.1)

Description

Vulnerability in the Oracle JavaFX product of Oracle Java SE (component: JavaFX). Supported versions that are affected are Oracle JavaFX: 25.0.4 and 27. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle JavaFX. 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 JavaFX 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).

Is your site exposed to CVE-2026-91477?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

3.1

LOW

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

EPSS — Exploit Prediction

0.0023

Probability of exploitation

0.13%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-922 CWE-922

References

Other References

https://www.oracle.com/security-alerts/cpuoct2026.html

Frequently Asked Questions

What is CVE-2026-91477? +

Vulnerability in the Oracle JavaFX product of Oracle Java SE (component: JavaFX). Supported versions that are affected are Oracle JavaFX: 25.0.4 and 27. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle JavaFX. 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 JavaFX 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). It has a CVSS v3.1 base score of 3.1 (LOW).

How severe is CVE-2026-91477? +

CVE-2026-91477 has a CVSS v3.1 score of 3.1 out of 10, rated LOW. This is a low-severity vulnerability with limited impact. The EPSS score is 0.0023, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-91477? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-2489

Insecure information storage vulnerability in NTFS Tools version 3.5.1. Exploitation of this vulnerability could allow an attacker to know the …

CVE-2024-38496

The vulnerability allows a malicious low-privileged PAM user to access information about other PAM users and their group memberships.

CVE-2025-54083

Insecure Storage of Sensitive Information vulnerability in Calix GigaCenter ONT (Quantenna SoC modules) allows admin access to the web interface.This …

CVE-2025-10971

Insecure Storage of Sensitive Information vulnerability in MeetMe on iOS, Android allows Retrieve Embedded Sensitive Data. This issue affects MeetMe: …

CVE-2026-46511

HAX CMS helps manage microsite universe with PHP or NodeJs backends. Prior to version 26.0.0, an attack chain utilizing Stored …

CVE-2026-77875

The application protects access through its calculator-style vault passcode, but the stored data is not bound to that authentication boundary. …

CVE-2026-91477