---
cve: "CVE-2026-33656"
severity: "CRITICAL"
cvss: 9.1
epss: "0.5%"
vendor: "espocrm"
kev: false
exploited: false
published: "2026-04-22 21:17:05"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T18:41:31+02:00"
---

# CVE-2026-33656

> 9.1 CRITICAL · 🧪 PoC

## Beschreibung

EspoCRM is an open source customer relationship management application. Prior to version 9.3.4, EspoCRM's built-in formula scripting engine allowing updating attachment's sourceId thus allowing an authenticated admin to overwrite the `sourceId` field on `Attachment` entities. Because `sourceId` is concatenated directly into a file path with no sanitization in `EspoUploadDir::getFilePath()`, an attacker can redirect any file read or write operation to an arbitrary path within the web server's `open_basedir` scope. Version 9.3.4 fixes the issue.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- f1763e732f34fbebf7f70f176eec1ccd8a272679 (Commit)

## Referenzen

- <https://github.com/espocrm/espocrm/security/advisories/GHSA-7922-x7cf-j54x>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-33656) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_