---
cve: "CVE-2026-82653"
severity: "CRITICAL"
cvss: 9.3
epss: "76.5%"
vendor: "siyuan-note"
kev: false
exploited: false
published: "2026-08-30 15:16:46"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-02T10:25:37+02:00"
---

# CVE-2026-82653

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

SiYuan before v3.8.1 contains a stored cross-site scripting vulnerability in confirmDialog() where unescaped package names and notebook names are interpolated directly into innerHTML assignments. Attackers can submit malicious bazaar packages with HTML/script payloads in the name field that execute in users' browsers when uninstalling packages or unlocking encrypted notebooks.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- afa823b6b4e4f183511e0bc0a3be93caa94c7c97 (Commit)

## Referenzen

- <https://github.com/siyuan-note/siyuan/security/advisories/GHSA-hvwp-43j9-4xgf>
- <https://www.vulncheck.com/advisories/siyuan-before-3.8.1-stored-xss-via-confirmdialog>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-82653) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_