---
cve: "CVE-2026-65606"
severity: "CRITICAL"
cvss: 9.4
epss: "0.6%"
vendor: "siyuan-note"
kev: false
exploited: false
published: "2026-07-23 12:18:47"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T00:05:39+02:00"
---

# CVE-2026-65606

> 9.4 CRITICAL · 🧪 PoC

## Beschreibung

SiYuan before v3.7.2 contains a cross-site scripting vulnerability in the siyuan:// protocol handler. When a siyuan://plugins/ link references a name that is not an installed plugin, the application opens a custom tab and inserts the link's icon parameter into the tab header via innerHTML without escaping it (app/src/layout/Tab.ts), allowing injection of an  element. Because the SiYuan Desktop renderer runs with nodeIntegration:true, the injected JavaScript can access Node's require and call require('child_process').execSync(...), escalating the cross-site scripting into arbitrary operating-system command execution.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |

## Patch verfügbar (OSV)

- 726dae1d518927f70ea609bc146288b9aa95e366 (Commit)

## Referenzen

- <https://github.com/siyuan-note/siyuan/security/advisories/GHSA-wp64-x7qh-h728>
- <https://github.com/siyuan-note/siyuan/commit/41f2861c87575ff5ac4b50a0520b1a4fe55b4a70>
- <https://www.vulncheck.com/advisories/siyuan-before-cross-site-scripting-to-rce>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-65606) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_