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
Attackers can inject headers in download views causing content-type confusion, requiring a patch for Joomla CMS.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-71572?
CVE-2026-71572 is a medium-severity vulnerability in Joomla Joomla\!, published on 18 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-93
Which versions are affected by CVE-2026-71572?
1 open source package ship an affected version, including joomla. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
joomla Bitnami | From 3.0.0 | 5.4.8, 6.1.4 |
Products include Joomla Joomla\!.
How do I fix CVE-2026-71572?
Upgrade joomla to a fixed version for your release line: 5.4.8 or 6.1.4.
Is CVE-2026-71572 being exploited?
There is no known exploitation of CVE-2026-71572 in the wild and no public exploit code.
Other vulnerabilities in Joomla Joomla\!
- CVE-2016-10033 PHPMailer Command Injection
- CVE-2023-23752 Joomla! Improper Access Control
- CVE-2026-48902 Joomla! Core - [20260518] - Transport encryption downgrade for password and username reset links
- CVE-2025-25226 [20250401] - Joomla Framework - SQL injection vulnerability in quoteNameStr method of Database package
- CVE-2022-23795 [20220303] - Core - User row are not bound to a authentication mechanism
Sources
Also known as BIT-joomla-2026-71572, GHSA-xxjc-v4p5-g68g.