CVE-2026-27636
FreeScout: Missing .htaccess in Restricted File Extensions Allows Remote Code Execution on Apache
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.
INFO
Published Date :
Feb. 25, 2026, 4:16 a.m.
Last Modified :
Feb. 26, 2026, 4:07 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update FreeScout to version 1.8.206.
- Apply vendor-provided patches if available.
- Review server configuration for AllowOverride settings.
Public PoC/Exploit Available at Github
CVE-2026-27636 has a 3 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-27636.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-27636 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-27636
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
CVE-2026-28289
Python
Freescout-passive-scanner
Python
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-27636 vulnerability anywhere in the article.
-
Help Net Security
FreeScout vulnerability enables unauthenticated, zero-click RCE via email (CVE-2026-28289)
A newly discovered vulnerability (CVE-2026-28289) in the open-source help desk platform FreeScout could allow attackers to take over vulnerable servers by sending a specially crafted email to a FreeSc ... Read more
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CybersecurityNews
Mail2Shell Zero-Click Attack lets Hackers Hijack FreeScout Mail Servers
Hackers Hijack FreeScout Mail Servers Researchers have uncovered a critical zero-click vulnerability in FreeScout, a widely used open-source help desk and shared mailbox application. Dubbed “Mail2Shel ... Read more
The following table lists the changes that have been made to the
CVE-2026-27636 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Feb. 26, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:* versions up to (excluding) 1.8.206 Added Reference Type GitHub, Inc.: https://github.com/freescout-help-desk/freescout/commit/9984071e6f1b4e633fdcffcea82bbebc9c1e009c Types: Patch Added Reference Type GitHub, Inc.: https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9 Types: Not Applicable Added Reference Type GitHub, Inc.: https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc Types: Exploit, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9 Types: Not Applicable -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Feb. 25, 2026
Action Type Old Value New Value Added Reference https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9 Added Reference https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc -
New CVE Received by [email protected]
Feb. 25, 2026
Action Type Old Value New Value Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-434 Added Reference https://github.com/freescout-help-desk/freescout/commit/9984071e6f1b4e633fdcffcea82bbebc9c1e009c Added Reference https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9 Added Reference https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc