---
id: CVE-2026-91375
title: 'Vulnerability in Oracle Java SE (component: Libraries)'
summary: >-
  Vulnerability in Oracle Java SE (component: Libraries).  Supported versions
  that are affected are Oracle Java SE: 8u503-perf, 11.0.32.1, 17.0.20.1,
  21.0.12.1, 25.0.4.1, 27; Oracle GraalVM for JDK: 17.0.20.1 and  21.0.12.1;
  Oracle GraalVM…
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N'
cvssSource: cna
vendor: Oracle Corporation
product: Oracle Java SE
affected:
  - 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
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T21:25:37.216Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-91375'
references:
  - url: 'https://www.oracle.com/security-alerts/cpuoct2026.html'
    label: Oracle Advisory
tags:
  - cve.org
ingestedAt: '2026-10-20T22:23:33.782Z'
---

## Overview

Vulnerability in Oracle Java SE (component: Libraries).  Supported versions that are affected are Oracle Java SE: 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1, 27; Oracle GraalVM for JDK: 17.0.20.1 and  21.0.12.1; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Difficult to exploit vulnerability allows unauthenticated attacker with logon to the infrastructure where Oracle Java SE executes 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 creation, deletion or modification access to critical data or all Oracle Java SE accessible data. 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 4.7 (Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N).

## Affected

- `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`

## Remediation

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