CVE-2026-40496

UNKNOWN 0.0

FreeScout has Predictable Attachment Token that Allows Unauthenticated Private File Download via Brute Force

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, attachment download tokens are generated using a weak and predictable formula: `md5(APP_KEY + attachment_id + size)`. Since attachment_id is sequential and size can be brute-forced in a small range, an unauthenticated attacker can forge valid tokens and download any private attachment without credentials. Version 1.8.213 fixes the issue.

CWE	CWE-330 CWE-340
Vendor	freescout-help-desk
Product	freescout
Published	Apr 21, 2026

Stay Ahead of the Next One

Get instant alerts for freescout-help-desk freescout

Be the first to know when new unknown vulnerabilities affecting freescout-help-desk freescout are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

Affected Versions

freescout-help-desk / freescout

< 1.8.213

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-2783-wxmm-wmwr github.com: https://github.com/freescout-help-desk/freescout/commit/dbdf8f2260b43a21818255c70f0b61b9de9cd555 github.com: https://github.com/freescout-help-desk/freescout/releases/tag/1.8.213