---
id: CVE-2026-58504
title: draw.io is a configurable diagramming and whiteboarding application
summary: >-
  draw.io is a configurable diagramming and whiteboarding application. Prior to
  version 30.2.5, opening or importing a crafted .drawio file can execute
  attacker-controlled JavaScript in the draw.io origin when selected cells are
  processed …
severity: medium
cvss: 6.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
  - CWE-116
vendor: jgraph
product: drawio
affected:
  - drawio < 30.2.5
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-2026-58504'
references:
  - url: >-
      https://github.com/jgraph/drawio/commit/7976c02e1b10b1687c028d82782f9f5d90a885d6
    label: security-advisories@github.com
  - url: 'https://github.com/jgraph/drawio/releases/tag/v30.2.5'
    label: security-advisories@github.com
  - url: 'https://github.com/jgraph/drawio/security/advisories/GHSA-c76x-r78m-phwx'
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
epss: 0.00355
epssPercentile: 0.26448
ingestedAt: '2026-09-21T16:49:07.874Z'
---

## Overview

draw.io is a configurable diagramming and whiteboarding application. Prior to version 30.2.5, opening or importing a crafted .drawio file can execute attacker-controlled JavaScript in the draw.io origin when selected cells are processed by TextFormatPanel.addFont() in src/main/webapp/js/grapheditor/Format.js. An HTML sibling cell keeps the formatted-label path enabled while an editable=0 plain-text sibling is excluded from the merged selection style but remains in the iteration set. graph.cellRenderer.getLabelValue() returns that plain-text label without HTML encoding, and mxUtils.canConvertHtmlToSvg() parses it as HTML, bypassing the earlier CVE-2026-46642 remediation. Successful exploitation can expose diagram data, browser storage, non-HttpOnly cookies, and same-origin actions available to the victim. This issue is fixed in version 30.2.5.

## Remediation

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