Critical 9.1Published Apr 21, 2026

CVE-2026-40496FreeScout is a free self-hosted help desk and shared mailbox.

Updated under an hour ago (2026-10-19 13:10 UTC)

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It affects freescout. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for freescout

Exploited in the last 30 days

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.

CVSS: 9.1 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-330, CWE-340
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

freescout freescout freescout:freescout	before 1.8.213	NVD

References

https://github.com/freescout-help-desk/freescout/commit/dbdf8f2260b43a21818255c70f0b61b9de9cd555patch
https://github.com/freescout-help-desk/freescout/releases/tag/1.8.213release-notes
https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-2783-wxmm-wmwrexploit, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.