---
cve: "CVE-2026-56290"
severity: "CRITICAL"
cvss: 10.0
epss: "30.9%"
vendor: "joomlack.fr"
kev: true
exploited: true
published: "2026-06-29 15:16:42"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T20:27:55+02:00"
---

# CVE-2026-56290

> 10.0 CRITICAL · ⚠️ CISA KEV (77 Tage) · 🔓 Exploited

## Beschreibung

Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0 - The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/U:Red
```

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

## Exploit-Evidenz

- [EDB-52626 — Joomla Page Builder CK  3.5.10 -  Arbitrary File Upload](https://www.exploit-db.com/exploits/52626)

## Referenzen

- <https://www.joomlack.fr/>
- <https://forum.joomlack.fr/index.php/page-builder-ck/21627-nouvelle-version-de-pbck-et-joomla-3>
- <https://mysites.guru/blog/pagebuilderck-unauthenticated-file-upload-rce/>
- <https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56290>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-56290) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_