Critical severity9.1NVD Advisory· Published Apr 21, 2026· Updated Apr 23, 2026

CVE-2026-40496

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Freescout/Freescout2 versions
cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:freescout:freescout:*:*:*:*:*:*:*:*range: <1.8.213
- (no CPE)range: <1.8.213

Patches

Vulnerability mechanics

References

github.com/freescout-help-desk/freescout/commit/dbdf8f2260b43a21818255c70f0b61b9de9cd555nvdPatch
github.com/freescout-help-desk/freescout/security/advisories/GHSA-2783-wxmm-wmwrnvdExploitVendor Advisory
github.com/freescout-help-desk/freescout/releases/tag/1.8.213nvdRelease Notes

News mentions

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cvss	0.591
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000