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CVE-2026-56290

Joomlack Page Builder Improper Access Control Vulnerability

Joomlack Page Builder CWE-434

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 Score
10
Critical
EPSS — Exploit Probability
31%
Riskier than 98% of all CVEs · checked 2026-10-05
Exploitation
Confirmed in the wild
KEV since 2026-07-07
Remediation
Patch available
Federal deadline 2026-07-10
CISA required action

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. Deadline for federal agencies: 2026-07-10.

NVD entry Vendor patch PoC / advisory CISA KEV

10 articles across 5 outlets · first covered Jul 7, 2026 · latest Jul 9, 2026

Coverage timeline