---
cve: "CVE-2026-58504"
severity: "MEDIUM"
cvss: 6.1
epss: "5.9%"
vendor: "jgraph"
kev: false
exploited: false
published: "2026-09-21 17:17:36"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T03:07:10+02:00"
---

# CVE-2026-58504

> 6.1 MEDIUM · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Erforderlich | good |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Referenzen

- <https://github.com/jgraph/drawio/security/advisories/GHSA-c76x-r78m-phwx>
- <https://github.com/jgraph/drawio/commit/7976c02e1b10b1687c028d82782f9f5d90a885d6>
- <https://github.com/jgraph/drawio/releases/tag/v30.2.5>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-58504) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_