---
cve: "CVE-2026-23850"
severity: "HIGH"
cvss: 7.8
epss: "0.6%"
vendor: "siyuan-note"
kev: false
exploited: false
published: "2026-01-19 20:15:49"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-01T08:52:45+02:00"
---

# CVE-2026-23850

> 7.8 HIGH · 🧪 PoC

## Beschreibung

SiYuan is a personal knowledge management system. In versions prior to 3.5.4, the markdown feature allows unrestricted server side html-rendering which allows arbitrary file read (LFD). Version 3.5.4 fixes the issue.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **yes**
  - Technical Impact: **partial**

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- d5d10dd41b0c9090adc63062c77185e711d59030 (Commit)
- b2274baba2e11c8cf8901b0c5c871e5b27f1f6dd (Commit)

## Referenzen

- <https://github.com/siyuan-note/siyuan/security/advisories/GHSA-cv54-7wv7-qxcw>
- <https://github.com/siyuan-note/siyuan/issues/16860>
- <https://github.com/siyuan-note/siyuan/commit/b2274baba2e11c8cf8901b0c5c871e5b27f1f6dd>
- <https://github.com/siyuan-note/siyuan/commit/f8f4b517077b92c90c0d7b51ac11be1b34b273ad>
- <https://github.com/siyuan-note/siyuan/blob/master/kernel/model/file.go#L1035>
- <https://github.com/siyuan-note/siyuan/blob/v3.4.2/kernel/api/filetree.go#L799-L886>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-23850) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_