---
id: "CVE-2026-91382"
kind: "vulnerability"
aliases: ["CVE-2026-91382"]
title: "Oracle Java SE: 2D component flaw lets unauthenticated network attackers modify data"
severity: "medium"
cvss: 6.5
epss: 0.00291
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["graalvm", "java", "runtime", "self-hosted", "web-services"]
not_affected_if: ["default-config"]
published_at: "2026-10-20T22:20:41+00:00"
first_seen_at: "2026-10-23T21:57:26+00:00"
updated_at: "2026-10-25T12:38:52+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-91382", "first_seen_at": "2026-10-23T21:57:26+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-91382", "first_seen_at": "2026-10-25T12:38:52+00:00"}]
---

# Oracle Java SE: 2D component flaw lets unauthenticated network attackers modify data

A flaw in the 2D component of Oracle Java SE and GraalVM lets an unauthenticated attacker with network access modify data and partly disrupt service, through a web service that feeds data to the affected APIs. The description also covers Java Web Start and applet sandboxes that run untrusted code.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `java -version` and compare against the affected releases: Java SE 8u503, 11.0.32.1, 17.0.20.1
- For GraalVM, check `native-image --version` against 17.0.20.1, 21.0.12.1 and 21.3.19.1.1

## Fix

- Move Java SE 8 to `8u503` or later, 11 to `11.0.32.1` or later, 17 to `17.0.20.1` or later, using the patched Oracle release for your line
- Move GraalVM for JDK and GraalVM Enterprise to the patched release that Oracle lists for your version

## Timeline

- 2026-10-23T21:57:26+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-91382
- 2026-10-25T12:38:52+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-91382

## From the sources

Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: 2D).  Supported versions that are affected are Oracle Java SE: 8u503, 8u503-perf, 11.0.32.1, 17.0.20.1;    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 network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition.  Successful attacks of this vulnerability can result in  unauthorized creation, deletion or modification access to critical data or all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE, 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 6.5 (Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L).

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_