CVE-2026-27343 is a Local File Inclusion (LFI) vulnerability found in VanKarWai Airtifact, a PHP-based application, affecting versions up to and including 1.2.91. The vulnerability stems from improper control over the filename parameter used in PHP include or require statements, which are functions that incorporate and execute code from files. When user input is not properly sanitized or validated before being passed to these functions, an attacker can manipulate the input to include arbitrary local files on the server. This can lead to disclosure of sensitive files such as configuration files, password files, or application source code, and in some cases, may allow remote code execution if combined with other vulnerabilities or misconfigurations. The vulnerability does not require authentication, making it easier for remote attackers to exploit. No public exploits have been reported yet, but the flaw is publicly disclosed and documented in the CVE database. The absence of a CVSS score indicates that the vulnerability is newly published, but its characteristics suggest a high risk. The vulnerability affects all installations of Airtifact up to version 1.2.91, and the lack of patch links suggests that a fix may not yet be available, requiring users to apply workarounds or mitigations. The vulnerability is classified under improper input validation and insecure file inclusion practices, common issues in PHP web applications.

The exploitation of CVE-2026-27343 can have severe consequences for organizations running vulnerable versions of VanKarWai Airtifact. Successful exploitation can lead to unauthorized disclosure of sensitive information such as credentials, internal configuration files, or source code, compromising confidentiality. Attackers may also leverage the vulnerability to execute arbitrary code if they can include files containing malicious payloads, impacting integrity and potentially availability. This can result in full system compromise, data breaches, and disruption of services. The vulnerability's ease of exploitation without authentication increases the risk of automated attacks and widespread scanning. Organizations in sectors relying on Airtifact for critical operations could face operational downtime, reputational damage, and regulatory penalties if sensitive data is exposed. Additionally, the vulnerability could be chained with other exploits to escalate privileges or move laterally within networks. Given the widespread use of PHP applications globally, the scope of affected systems is significant, especially in industries such as software development, digital forensics, and incident response where Airtifact is used.

To mitigate CVE-2026-27343, organizations should first check for and apply any official patches or updates from VanKarWai once available. Until a patch is released, implement strict input validation and sanitization on all user-supplied data that may influence file inclusion paths. Employ whitelisting techniques to restrict included files to a predefined set of safe files or directories. Disable remote file inclusion settings in PHP (e.g., allow_url_include=Off) to reduce attack surface. Use PHP's realpath() function to resolve and verify file paths before inclusion. Implement web application firewalls (WAFs) with rules to detect and block suspicious file inclusion attempts. Monitor logs for unusual file access patterns or errors related to file inclusion. Consider isolating the Airtifact application in a sandboxed environment with minimal privileges to limit potential damage. Conduct regular security audits and code reviews focusing on file inclusion logic. Educate developers and administrators about secure coding practices related to file handling in PHP.