CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Called exploited 2 days before disclosure.
Measured from the CVE publication date to the earliest of 3 KEV catalogues that list it.
The life of this vulnerability
- CVE published
- First KEV listing2d
- Last KEV listing10d
- Last sighting44d
Gaps are compressed to equal steps. The elapsed time is printed under each.
Which catalogues call it exploited
- CISA KEVUS federallisted Jul 7, 2026
- EUVDENISA, European Unionlisted Jul 7, 2026
- VulnCheck KEVcommercial researchlisted Jun 27, 2026
- CIRCLaggregator, mirrors the abovelisted Jul 7, 2026, not counted
3 catalogues list it. CIRCL aggregates the others and is shown but not counted.
Public exploitation evidence
- reported exploitationwww.acn.gov.it/portale/documents/20119/1300791/Operational_S
- reported exploitationwww.recordedfuture.com/blog/july-2026-cve-landscape
- reported exploitationprevidian.com/CVE-2026-56290
- reported exploitationwww.cisa.gov/sites/default/files/feeds/known_exploited_vulne
- reported exploitationmysites.guru/blog/pagebuilderck-unauthenticated-file-upload-
5 public reports collected from VulnCheck and CIRCL, first on Jun 27, 2026. Each links to its original source. We have not verified them.
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.
Required action (CISA)
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.
