What is CVE-2026-27636?

CVE-2026-27636 is a high-severity vulnerability in Freescout, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-02-25.

How severe is CVE-2026-27636?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2026-27636 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Arbitrary file upload in Freescout

CVE-2026-27636

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 ser…

Vulnerability class: Unrestricted File Upload

EPSS: 0.021 (79.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Freescout
Freescout-help-desk Freescout — versions < 1.8.206

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Public proof-of-concept exploits

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
security-advisories@github.com (x_refsource_MISC, Not Applicable)
security-advisories@github.com (Patch, x_refsource_MISC)

Frequently asked questions

What is CVE-2026-27636?: CVE-2026-27636 is a high-severity vulnerability in Freescout, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-02-25.
How severe is CVE-2026-27636?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2026-27636 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.