---
id: CVE-2026-91418
title: >-
  Vulnerability in the Oracle Java SE, Oracle JavaFX, Oracle GraalVM for JDK,
  Oracle GraalVM Enterprise Edition product of Oracle Java SE (component:
  ImageIO)
summary: >-
  Vulnerability in the Oracle Java SE, Oracle JavaFX, Oracle GraalVM for JDK,
  Oracle GraalVM Enterprise Edition product of Oracle Java SE (component:
  ImageIO).  Supported versions that are affected are Oracle Java SE: 8u503,
  8u503-perf, 11…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cvssSource: cna
vendor: Oracle Corporation
product: Oracle Java SE
affected:
  - oracle_java_se 8u503
  - oracle_java_se 8u503-perf
  - oracle_java_se 11.0.32.1
  - oracle_java_se 17.0.20.1
  - oracle_java_se 21.0.12.1
  - oracle_java_se 25.0.4.1
  - oracle_java_se 27
  - oracle_javafx 21.0.12
  - oracle_javafx 25.0.4
  - oracle_javafx 27
  - oracle_graalvm_for_jdk 17.0.20.1
  - oracle_graalvm_for_jdk 21.0.12.1
  - oracle_graalvm_enterprise_edition 21.3.19.1.1
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T21:25:51.705Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-91418'
references:
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
    label: Oracle Advisory
tags:
  - cve.org
ingestedAt: '2026-10-20T22:23:33.761Z'
---

## Overview

Vulnerability in the Oracle Java SE, Oracle JavaFX, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: ImageIO).  Supported versions that are affected are Oracle Java SE: 8u503, 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27; Oracle JavaFX: 21.0.12, 25.0.4, 27; Oracle GraalVM for JDK: 17.0.20.1 and  21.0.12.1; 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 for JDK, Oracle GraalVM Enterprise Edition.  Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE, Oracle JavaFX, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also 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. CVSS 3.1 Base Score 5.3 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

## Affected

- `oracle_java_se 8u503`
- `oracle_java_se 8u503-perf`
- `oracle_java_se 11.0.32.1`
- `oracle_java_se 17.0.20.1`
- `oracle_java_se 21.0.12.1`
- `oracle_java_se 25.0.4.1`
- `oracle_java_se 27`
- `oracle_javafx 21.0.12`
- `oracle_javafx 25.0.4`
- `oracle_javafx 27`
- `oracle_graalvm_for_jdk 17.0.20.1`
- `oracle_graalvm_for_jdk 21.0.12.1`
- `oracle_graalvm_enterprise_edition 21.3.19.1.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.