CVE-2026-71572: Joomla! Core - [20260801] - Response header injection in download views in Joomla 3.0.0-5.4.7, 6.0.0-6.1.2

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-18 · updated 2026-10-22
Weakness: CWE-93

Description

Joomla! Core - [20260801] - Response header injection in download views in Joomla 3.0.0-5.4.7, 6.0.0-6.1.2 - Lack of output processing allowed a header injection in the multiple download views, leading to reflected file download / content-type confusion.

Affected products

Joomla!: from 3.0.0 before 5.4.8; from 6.0.0 through 6.1.3 — fixed in 5.4.8

How to fix

Upgrade to a fixed version: Joomla! 5.4.8. Check the vendor advisory for mitigations.

References

https://developer.joomla.org/security-centre/1068-20260801-core-response-header-injection-in-download-views.html
https://www.joomla.org/

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