The vulnerability CVE-2026-23801 in fuelthemes 'The Issue' product (versions up to 1.6.11) is caused by improper validation or control of filenames used in PHP include or require statements. This allows an attacker to perform Local File Inclusion (LFI), potentially leading to remote code execution or disclosure of sensitive files. The CVSS 3.1 base score is 8.1, reflecting network attack vector with high impact on confidentiality, integrity, and availability. The vulnerability is publicly known but lacks an official patch or vendor advisory at this time.

Successful exploitation of this vulnerability could allow an attacker to include arbitrary files on the server, which may lead to disclosure of sensitive information, code execution, or complete system compromise. The CVSS score of 8.1 indicates high impact on confidentiality, integrity, and availability. No known exploits in the wild have been reported so far.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should restrict access to vulnerable endpoints, validate and sanitize all user inputs related to file inclusion, and consider disabling or restricting PHP include/require functionality if feasible. Monitor for updates from fuelthemes regarding patches or official mitigations.