CVE-2026-56290

9.8 CRITICAL CISA KEV - Actively Exploited
Published: June 29, 2026 Modified: July 24, 2026
View on NVD

Description

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://www.joomlack.fr/
Source: security@joomla.org
Product
https://forum.joomlack.fr/index.php/page-builder-ck/21627-nouvelle-version-de-pbck-et-joomla-3
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Issue Tracking Patch
https://mysites.guru/blog/pagebuilderck-unauthenticated-file-upload-rce/
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-56290
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.8 / 10.0
EPSS (Exploit Probability)
83.3%
100th percentile
Exploitation Status
Actively Exploited
Remediation due: 2026-07-10

Weaknesses (CWE)

CWE-434 CWE-434

Affected Vendors

joomlack

Related CVEs

CVE-2026-64530 N/A
CVE-2024-14040 N/A
CVE-2026-63720 7.5
CVE-2026-17434 6.3
CVE-2026-17433 5.3