CVE-2026-28289 - FreeScout 1.8.206 Patch Bypass for CVE-2026-27636 via Zero-Width Space Character...

CVE ID : CVE-2026-28289 Published : March 3, 2026, 11:15 p.m. | 1 hour, 5 minutes ago Description : FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. A patch bypass vulnerability for CVE-2026-27636 in FreeScout 1.8.206 and earlier allows any authenticated user with file upload permissions to achieve Remote Code Execution (RCE) on the server by uploading a malicious .htaccess file using a zero-width space character prefix to bypass the security check. The vulnerability exists in the sanitizeUploadedFileName() function in app/Http/Helper.php. The function contains a Time-of-Check to Time-of-Use (TOCTOU) flaw where the dot-prefix check occurs before sanitization removes invisible characters. This vulnerability is fixed in 1.8.207. Severity: 10.0 | CRITICAL Visit the link for more details, such as CVSS details, affected products, timeline, and more...