CVE-2026-27636

High

CVSS 8.8PoC Available

Description

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206, FreeScout's file upload restriction list in `app/Misc/Helper.php` does not include `.htaccess` or `.user.ini` files. On Apache servers with `AllowOverride All` (a common configuration), an authenticated user can upload a `.htaccess` file to redefine how files are processed, enabling Remote Code Execution. This vulnerability can be exploited on its own or in combination with CVE-2026-27637. Version 1.8.206 fixes both vulnerabilities.

CVSS Score

8.8/ 10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness Classification (CWE)

CWE-434Unrestricted Upload of FileMITRE

Known Exploits

POC

https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vcexploit https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vcexploit

References (5)

https://github.com/freescout-help-desk/freescout/commit/9984071e6f1b4e633fdcffcea82bbebc9c1e009csecurity-advisories@github.com https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9security-advisories@github.com https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vcsecurity-advisories@github.com https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9134c704f-9b21-4f2e-91b3-4a467353bcc0 https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc134c704f-9b21-4f2e-91b3-4a467353bcc0

Risk Assessment

ELEVATED

Known exploit

Details

Severity: High
CVSS: 8.8
CWE: CWE-434
Exploit: POC
CISA KEV: No
Articles: 1

Timeline

Published

Feb 25, 2026

External Links

NVD (NIST)CVE Details MITRE CVE