---
cve: "CVE-2026-52782"
severity: "CRITICAL"
cvss: 9.9
epss: "26%"
vendor: "opf"
kev: false
exploited: false
published: "2026-06-26 20:17:18"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T03:28:23+02:00"
---

# CVE-2026-52782

> 9.9 CRITICAL · 🧪 PoC

## Beschreibung

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, there is an IDOR through /projects//settings/project_storages/ via PATCH parameter "storages_project_storage[project_folder_id]" leads to Access to Unauthorized Resources. A project-admin in one project can hijack the managed Nextcloud or OneDrive folder of another project on the same storage by writing the victim project's project_folder_id into the attacker's Storages::ProjectStorage row. The next managed-folder sync overwrites the ACL on the referenced folder with the attacker project's user list. This vulnerability is fixed in 17.3.3 and 17.4.1.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 5ee515c5c80c3aaf1e7527f63e4e69798aef1b29 (Commit)
- 8203fc2286fd48d7d72f52b3c4a2487f96fcea28 (Commit)

## Referenzen

- <https://github.com/opf/openproject/security/advisories/GHSA-3vpx-94qx-xpw6>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-52782) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_