HIGHCVE-2026-40496Published Modified CNA GitHub_M
CVE-2026-40496: FreeScout has Predictable Attachment Token that Allows Unauthenticated Private File Download via Brute Force
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.
Metrics
- CVSS v4.0
- 8.8
- Severity
- HIGH
- Fixed in
- —
- Affected Products
- 1
Affected packages
- freescout-help-desk / freescout< 1.8.213
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P