---
cve: "CVE-2026-59236"
severity: "MEDIUM"
cvss: 6.9
epss: "47%"
vendor: "Roskus"
kev: false
exploited: false
published: "2026-07-15 12:18:17"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T22:35:31+02:00"
---

# CVE-2026-59236

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

Authorization Bypass Through User-Controlled Key (CWE-639) in the Excel import handlers (CustomerImport, LeadImport, ProductImport) in Roskus Prospero Flow CRM before 5.14.0 allows a remote, authenticated user of any role or company to create customer, lead, and product records inside another company's tenant via a spreadsheet whose company_id column points to the victim tenant, uploaded to POST /customer/import/excel/save, which maps company_id directly from the file and performs no check that it matches the authenticated user's company.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
```

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

## Schwachstellen-Klasse

- **CWE-639** — Authorization Bypass Through User-Controlled Key
  The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

## Patch verfügbar (OSV)

- ab96b114b3ab5c09481f39c1922cbcec151f26ed (Commit)

## Referenzen

- <https://github.com/Roskus/prospero-flow-crm/commit/bdd6c9770a7435a45f0411154671b8a3e94dcdaa>
- <https://github.com/Roskus/prospero-flow-crm/releases/tag/v5.14.0>
- <https://secur0.com/en/cna/cve-list/cve-2026-59236-authorization-bypass-in-prospero-flow-crm-excel-import-allows-cross-tenant-record-injection>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-59236) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_