---
cve: "CVE-2026-27637"
severity: "CRITICAL"
cvss: 9.8
epss: "67%"
vendor: "freescout-help-desk"
kev: false
exploited: false
published: "2026-02-25 04:16:04"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T21:35:21+02:00"
---

# CVE-2026-27637

> 9.8 CRITICAL · 🧪 PoC

## Beschreibung

FreeScout is a free help desk and shared inbox built with PHP's Laravel framework. Prior to version 1.8.206, FreeScout's `TokenAuth` middleware uses a predictable authentication token computed as `MD5(user_id + created_at + APP_KEY)`. This token is static (never expires/rotates), and if an attacker obtains the `APP_KEY` — a well-documented and common exposure vector in Laravel applications — they can compute a valid token for any user, including the administrator, achieving full account takeover without any password. This vulnerability can be exploited on its own or in combination with CVE-2026-27636. Version 1.8.206 fixes both vulnerabilities.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 63b225e380ffa4dc9a4816a18a53d46b69650ac0 (Commit)
- 004a8231f6e413af1d4680930b0e2342fd4283f9 (Commit)

## Referenzen

- <https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-6gcm-v8xf-j9v9>
- <https://github.com/freescout-help-desk/freescout/security/advisories/GHSA-mw88-x7j3-74vc>
- <https://github.com/freescout-help-desk/freescout/commit/004a8231f6e413af1d4680930b0e2342fd4283f9>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-27637) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_