CVE-2026-40383
Joomla! Core - [20260509] - LFI in HTMLView layout parameter
Description
An improper validation of user-supplied input leads to a local file inclusion vulnerability.
INFO
Published Date :
May 26, 2026, 5:16 p.m.
Last Modified :
May 27, 2026, 12:24 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | HIGH | 6ff30186-7fb7-4ad9-be33-533e7b05e586 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Validate and sanitize all user inputs.
- Avoid using user input in file paths.
- Implement strict file access controls.
Public PoC/Exploit Available at Github
CVE-2026-40383 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-40383.
| URL | Resource |
|---|---|
| https://developer.joomla.org/security-centre/1041-20260509-core-lfi-in-htmlview-layout-parameter.html | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-40383 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-40383
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Tracking Vulnerabilities That Appear to be Credited to the Anthropic Research Team
Security Fixes for Joomla 3 as an installable package.
PHP
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-40383 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-40383 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:joomla:joomla!:*:*:*:*:*:*:*:* versions from (including) 6.0.0 up to (excluding) 6.1.1 *cpe:2.3:a:joomla:joomla!:*:*:*:*:*:*:*:* versions from (including) 3.2.1 up to (excluding) 5.4.6 Added Reference Type Joomla! Project: https://developer.joomla.org/security-centre/1041-20260509-core-lfi-in-htmlview-layout-parameter.html Types: Vendor Advisory -
New CVE Received by [email protected]
May. 26, 2026
Action Type Old Value New Value Added Description An improper validation of user-supplied input leads to a local file inclusion vulnerability. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-22 Added Reference https://developer.joomla.org/security-centre/1041-20260509-core-lfi-in-htmlview-layout-parameter.html