---
cve: "CVE-2026-40496"
severity: "HIGH"
cvss: 8.8
epss: "40%"
vendor: "freescout-help-desk"
kev: false
exploited: false
published: "2026-04-21 02:16:08"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T06:21:22+02:00"
---

# CVE-2026-40496

> 8.8 HIGH · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- acf57a7a4b19544641523c6f7e51b1035c03c9b6 (Commit)
- dbdf8f2260b43a21818255c70f0b61b9de9cd555 (Commit)

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-40496) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_