---
cve: "CVE-2026-34213"
severity: "MEDIUM"
cvss: 5.4
epss: "0.2%"
vendor: "docmost"
kev: false
exploited: false
published: "2026-04-14 21:49:55"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-01T01:00:29+02:00"
---

# CVE-2026-34213

> 5.4 MEDIUM · 🧪 PoC

## Beschreibung

Docmost is open-source collaborative wiki and documentation software. Starting in version 0.3.0 and prior to version 0.71.0, improper authorization in Docmost allows a low-privileged authenticated user to overwrite another page's attachment within the same workspace by supplying a victim `attachmentId` to `POST /api/files/upload`. This is a remote integrity issue requiring no victim interaction. Version 0.71.0 contains a patch.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 642024ba9d1afcc7c14ad3c34da8495037faeaf1 (Commit)

## Referenzen

- <https://github.com/docmost/docmost/security/advisories/GHSA-89fp-2hch-j9gp>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-34213) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_