Answer in brief
CVE-2026-56290 records a Critical severity (CVSS 10.0) vulnerability in Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0. The current sources mark it as known exploited. The current feed maps joomlack.fr/JoomlaCK.fr Page Builder CK extension for Joomla (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 10.0. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps joomlack.fr/JoomlaCK.fr Page Builder CK extension for Joomla (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| joomlack.fr/JoomlaCK.fr Page Builder CK extension for Joomlageneric | 1.0-3.6.0 | Not reported |
Published upstream
Jun 29, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 29, 2026
Added to CISA KEV
Jul 7, 2026
Evidence: source:kev:kev:kev:recordJoomla 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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-56290 records a Critical severity (CVSS 10.0) vulnerability in Joomla Extension - joomlack.fr - Unauthenticated file upload in Page Builder CK extension < 3.6.0. The current sources mark it as known exploited. The current feed maps joomlack.fr/JoomlaCK.fr Page Builder CK extension for Joomla (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 10.0. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps joomlack.fr/JoomlaCK.fr Page Builder CK extension for Joomla (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| joomlack.fr/JoomlaCK.fr Page Builder CK extension for Joomlageneric | 1.0-3.6.0 | Not reported |
Published upstream
Jun 29, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 29, 2026
Added to CISA KEV
Jul 7, 2026
Evidence: source:kev:kev:kev:recordJoomla 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.
Quoted source text, attributed separately from HOL analysis.