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.
INFO
Published Date :
2026-03-03T22:59:08.679Z
Last Modified :
2026-03-05T21:09:30.846Z
Source :
GitHub_M
AFFECTED PRODUCTS
The following products are affected by CVE-2026-28289 vulnerability.
| Vendors | Products |
|---|---|
| Freescout |
|
| Freescout Helpdesk |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-28289.
