CVE-2026-40496: FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, attachment download tokens are…
CVE-2026-40496 · Severity: critical · CVSS 9.1 · Published 2026-04-21
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-40496 being exploited in the wild.
How severe is CVE-2026-40496?
Critical severity, with a CVSS score of 9.1, published 21 April 2026.
Which products and versions are affected?
FreeScout. The advisory does not name versions.
Is there a fix for CVE-2026-40496?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-40496?
Check whether you run FreeScout. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.