Arbitrary file upload in Freescout-help-desk 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: 0.173 (95.2th 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-help-desk Freescout — versions < 1.8.206
Weakness classification (CWE)
Public proof-of-concept exploits
References
- https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc (x_refsource_CONFIRM)
- https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9 (x_refsource_MISC)
- https://github.com/freescout-help-desk/freescout/commit/9984071e6f1b4e633fdcffcea82bbebc9c1e009c (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-27636?
- CVE-2026-27636 is a high-severity vulnerability in Freescout-help-desk 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.