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.

criticalpublic exploitCVSS 9.8CVE-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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: critical — CVSS 9.8
Published: 2026-06-29
Last updated: 2026-07-05
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-56290

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Moderate exploitation riskCVE-2026-562902.9% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 85% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-56290	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

highexploitedCISA Adds Three Known Exploited Vulnerabilities to Catalogcisa
criticalexploitedCVE-2026-56290: Joomlack Page Builder Improper Access Control Vulnerabilitycisa-kev

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.

Details

Exploitation outlook

Referenced CVEs

Same CVEs, other sources

More from NVD Recent CVEs