Skip to main content
CRITICAL

CVE-2026-28289

CVSS v3

10

CRITICAL

EPSS Score

22.3 %

exploit probability

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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 contain

Technical details

CVSS v3 Vector
3.1
Published
2026-03-03
Last Modified
2026-03-11

Frequently asked questions

What is CVE-2026-28289?

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 contain

Is CVE-2026-28289 actively exploited?

Active exploitation of CVE-2026-28289 has not been confirmed. The EPSS score is 22.3%, indicating the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-28289?

CVE-2026-28289 has a CVSS v3 base score of 10 (CRITICAL severity), with vector string 3.1.

Is CVE-2026-28289 affecting your environment?

Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.

Check an IPSearch CVEsSIEM & TIP integrations

No credit card required · 500 free checks/month · Free API key

Other 2026 vulnerabilities worth triaging

Ranked by exploit probability (EPSS).

Back to CVE Database