---
cve: "CVE-2026-104449"
severity: "HIGH"
cvss: 8.3
epss: "0.3%"
vendor: "YesWiki"
kev: false
exploited: false
published: "2026-10-02 12:17:16"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-23T11:21:02+02:00"
---

# CVE-2026-104449

> 8.3 HIGH · 🧪 PoC

## Beschreibung

YesWiki before 4.6.7 contains an access control vulnerability allowing unauthenticated attackers to overwrite any existing wiki page, including pages whose write ACL restricts editing, via the Bazar entry-creation flow. Attackers can submit a crafted entry with an attacker-controlled id_fiche matching an existing page, overwriting its body for mass defacement and content destruction.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-10-06 16:13:49
- CNA-CVSS: **8.3** (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

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

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

## Schwachstellen-Klasse

- **CWE-639** — Authorization Bypass Through User-Controlled Key
  The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

## Patch verfügbar (OSV)

- 07120ed8971047f504f7ec78060828f1895f475f (Commit)

## Referenzen

- <https://github.com/YesWiki/yeswiki/security/advisories/GHSA-4388-phmh-jrw8>
- <https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-unauthenticated-page-overwrite-via-bazar-id-fiche>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-104449/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_