What is CVE-2026-53593?

CVE-2026-53593 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 2026-07-20.

How severe is CVE-2026-53593?

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

Arbitrary file upload in Freescout-help-desk Freescout

CVE-2026-53593

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.224, the denylist that neutralizes dangerous file uploads (`Helper::$restricted_extensions`) is incomplete: it does not cover the `.pht…

Vulnerability class: Unrestricted File Upload

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 < 1.8.224

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-53593?: CVE-2026-53593 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 2026-07-20.
How severe is CVE-2026-53593?: High severity. CVSS v3 base score is 8.8 out of 10.