CVE-2026-56290

CRITICAL
Published Jun 29, 2026 Modified Jul 5, 2026 CWE-434

Description

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 v3.1 Score

9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0036
Probability of exploitation
0.28%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-434 Unrestricted Upload

Affected Products

Vendor Product
joomlack page_builder_ck

References

Frequently Asked Questions

What is CVE-2026-56290? +
The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE. It has a CVSS v3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2026-56290? +
CVE-2026-56290 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0036, placing it in the 0th percentile for exploitation probability.
What products are affected by CVE-2026-56290? +
CVE-2026-56290 affects products from joomlack, specifically: page_builder_ck. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2026-56290? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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