CVE-2026-56290 Joomlack Page Builder Improper Access Control
Unauthenticated attackers can upload executable files to the Page Builder CK extension, leading to remote code execution.
- Exploited in the wild
- Since 7 Jul 2026
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56290?
CVE-2026-56290 is a critical vulnerability in JoomlaCK.fr Page Builder CK extension for Joomla, published on 29 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-434
Which versions are affected by CVE-2026-56290?
It affects 1 product.
Products include Joomlack Page Builder Ck.
How do I fix CVE-2026-56290?
No fix has been published for CVE-2026-56290 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 10 Jul 2026.
Is CVE-2026-56290 being exploited?
Yes. Attackers have exploited CVE-2026-56290 in the wild since at least 7 Jul 2026.
Public exploit code: 1 Exploit-DB entry, 1 Nuclei template and 5 proofs of concept on GitHub.
Sources
Also known as GHSA-gxrr-wfg5-xqqf.