CVE-2026-28016 is a Local File Inclusion (LFI) vulnerability found in the ThemeREX Luxury Wine PHP theme, affecting versions up to 1.1.14. The vulnerability stems from improper control over the filename parameter used in PHP's include or require statements, allowing an attacker to manipulate the file path and include arbitrary files from the server's filesystem. This can lead to disclosure of sensitive files such as configuration files, source code, or credentials, and in some cases, enable remote code execution if combined with other vulnerabilities or misconfigurations. The flaw is due to insufficient input validation or sanitization of user-controlled input that determines the filename to be included. Although no public exploits have been reported yet, the vulnerability is critical because PHP file inclusion issues are commonly exploited in the wild. The affected product, Luxury Wine by ThemeREX, is a PHP-based theme likely used in WordPress or similar CMS environments, which are widely deployed globally. The vulnerability was reserved and published in early 2026, but no patches or fixes have been linked yet, indicating that users must rely on manual mitigations or updates from the vendor. The lack of a CVSS score requires an expert severity assessment based on the nature of the vulnerability and its potential impact.

The primary impact of CVE-2026-28016 is unauthorized disclosure of sensitive information through Local File Inclusion, which can expose configuration files, credentials, and source code. This compromises confidentiality and can lead to further attacks such as privilege escalation or remote code execution if attackers can include files that execute malicious code. The integrity of the system may also be compromised if attackers can manipulate included files or inject code. Availability impact is generally low unless the inclusion leads to application crashes or denial of service. The ease of exploitation is high because it does not require authentication or complex conditions, and user interaction is not necessarily needed beyond sending crafted requests. Organizations running the affected theme in PHP environments are at risk of data breaches, reputational damage, and potential regulatory penalties. The widespread use of PHP and WordPress themes increases the scope of affected systems globally, especially for websites that do not implement strict security controls or timely patching.

To mitigate CVE-2026-28016, organizations should first apply any available patches or updates from ThemeREX once released. Until then, manual mitigations include: 1) Implement strict input validation and sanitization on all user inputs that influence file inclusion paths, ensuring only allowed filenames or whitelisted paths are accepted. 2) Disable PHP's allow_url_include directive to prevent remote file inclusion attacks. 3) Configure open_basedir restrictions in PHP to limit file access to specific directories, reducing the risk of arbitrary file inclusion. 4) Employ Web Application Firewalls (WAFs) with rules to detect and block suspicious file inclusion attempts. 5) Conduct code reviews and security testing focused on file inclusion logic within the Luxury Wine theme. 6) Monitor web server and application logs for unusual file access patterns or errors related to include/require statements. 7) Consider isolating or sandboxing the affected application to limit potential damage. 8) Educate developers and administrators about secure coding practices related to file inclusion in PHP.