[20260801] - Core - Response header injection in download views

Project: Joomla!
SubProject: CMS
Impact: Low
Severity: Low
Probability: Low
Versions: 3.0.0-5.4.7, 6.0.0-6.1.2
Exploit type: Response header injection
Reported Date: 2026-07-02
Fixed Date: 2026-08-18
CVE Number: CVE-2026-71572

Description

Lack of output processing allowed a header injection in the multiple download views, leading to reflected file download / content-type confusion.

Affected Installs

Joomla! CMS versions 3.0.0-5.4.7, 6.0.0-6.1.2

Solution

Upgrade to version 5.4.8, 6.1.3

Contact

The JSST at the Joomla! Security Centre.

Reported By: arib06