Exploited vulnerability · CISA KEV

Is CVE-2026-56290 exploited? Yes: in CISA KEV since 7 Jul 2026

Gociux · Joomlack Page Builder · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2026-56290, Joomlack Page Builder Improper Access Control Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 7 Jul 2026, 8 days after it was published. It affects Joomlack Page Builder. If you run it, CISA's required action is: 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.

What it is

Joomlack Page Builder contains an improper access control vulnerability that could allow for remote code execution via unauthenticated arbitrary file upload.

What to do

1. Check whether you run it. Look for Page Builder in your asset inventory, including appliances and cloud images. Stack check lists every exploited Joomlack CVE at once.
2. Apply the fix. 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.
3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 29 Jun 2026.
4. Get told next time. Email alerts when CISA adds a CVE for Joomlack.

References

• www.joomlack.fr/en/joomla-extensions/page-builder-ck
• nvd.nist.gov/vuln/detail/CVE-2026-56290

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in July 2026 · act-now radar.