CVE-2026-40383 Joomla! Core - [20260509] - LFI in HTMLView layout parameter
Attackers can exploit improper input validation in the HTMLView layout parameter to include arbitrary local files, potentially exposing sensitive data.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-40383?
CVE-2026-40383 is a high-severity path traversal vulnerability in Joomla Joomla\!, published on 26 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
An improper validation of user-supplied input leads to a local file inclusion vulnerability.
Weakness: CWE-22
Which versions are affected by CVE-2026-40383?
1 open source package ship an affected version, including joomla. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
joomla Bitnami | From 3.2.1 | 5.4.6, 6.1.1 |
Products include Joomla Joomla\!.
How do I fix CVE-2026-40383?
Upgrade joomla to a fixed version for your release line: 5.4.6 or 6.1.1.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-40383 being exploited?
There is no known exploitation of CVE-2026-40383 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-2026-40383, GHSA-v8h9-9g8j-w7h4.