---
cve: "CVE-2026-47684"
severity: "HIGH"
cvss: 7.7
epss: "0.2%"
vendor: "Sync-in"
kev: false
exploited: false
published: "2026-06-16 15:16:41"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T08:22:25+02:00"
---

# CVE-2026-47684

> 7.7 HIGH · 🧪 PoC

## Beschreibung

Sync-in Server is a secure, open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.3.0, the private IP blocklist regex used in the URL download feature does not match IPv4-mapped IPv6 addresses (e.g. ::ffff:127.0.0.1), allowing SSRF protection to be bypassed on dual-stack systems. Version 2.3.0 fixes the issue.

## CVSS-Vektor

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

| 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 | Keine | good |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- e902f7ca264f08329bf976abcacafc7403ae6a37 (Commit)

## Referenzen

- <https://github.com/Sync-in/server/security/advisories/GHSA-q4x5-8cj6-52wg>
- <https://github.com/Sync-in/server/releases/tag/v2.3.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-47684) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_