---
id: CVE-2026-63334
title: draw.io is a configurable diagramming and whiteboarding application
summary: >-
  draw.io is a configurable diagramming and whiteboarding application. Prior to
  version 30.2.7, deployments with ENABLE_DRAWIO_PROXY=1 are vulnerable to
  server-side request forgery because
  src/main/java/com/mxgraph/online/Utils.java perfor…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N'
cwe:
  - CWE-367
  - CWE-918
vendor: jgraph
product: drawio
affected:
  - drawio < 30.2.7
published: '2026-09-21'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:26:49.087'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-63334'
references:
  - url: >-
      https://github.com/jgraph/drawio/commit/650fbd742814f6502f78248dc2d8e2aaa5e42b5e
    label: security-advisories@github.com
  - url: 'https://github.com/jgraph/drawio/releases/tag/v30.2.7'
    label: security-advisories@github.com
  - url: 'https://github.com/jgraph/drawio/security/advisories/GHSA-3v4h-8r2c-m8c5'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00315
epssPercentile: 0.21799
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-21T18:53:51.178568Z'
ingestedAt: '2026-09-21T16:49:07.870Z'
---

## Overview

draw.io is a configurable diagramming and whiteboarding application. Prior to version 30.2.7, deployments with ENABLE_DRAWIO_PROXY=1 are vulnerable to server-side request forgery because src/main/java/com/mxgraph/online/Utils.java performs the private-address check in Utils.sanitizeUrl() using one DNS resolution, while src/main/java/com/mxgraph/online/ProxyServlet.java later calls URL.openConnection() and performs a second resolution. An attacker-controlled hostname can resolve to a public address during validation and then to a private, link-local, or cloud metadata address when the connection is opened. Successful exploitation can return cloud instance metadata or responses from internal HTTP services through the proxy. This issue is fixed in version 30.2.7.

## Remediation

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