{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-56290: Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-56290","status":"final","version":"1","initial_release_date":"2026-06-29T14:31:37.952Z","current_release_date":"2026-06-29T15:17:54.659Z","revision_history":[{"date":"2026-06-29T14:31:37.952Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-56290 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-56290"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-56290"},{"category":"external","summary":"joomlack.fr","url":"https://www.joomlack.fr/"}]},"product_tree":{"branches":[{"category":"vendor","name":"joomlack.fr","branches":[{"category":"product_name","name":"JoomlaCK.fr Page Builder CK extension for Joomla","branches":[{"category":"product_version","name":"1.0-3.6.0","product":{"name":"joomlack.fr JoomlaCK.fr Page Builder CK extension for Joomla 1.0-3.6.0","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:joomlack.fr:joomlack.fr_page_builder_ck_extension_for_joomla:1.0-3.6.0:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-56290","title":"Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0","notes":[{"category":"description","text":"The Joomla extension Page Builder CK is vulnerable to an unauthenticated arbitrary file upload that allows uploading executable files and leads to full RCE.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v4":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/U:Red","baseScore":10,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}