---
cve: "CVE-2026-58269"
severity: "HIGH"
cvss: 8.1
epss: "26.3%"
vendor: "Sync-in"
kev: false
exploited: false
published: "2026-09-21 20:17:26"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-22T21:52:46+02:00"
---

# CVE-2026-58269

> 8.1 HIGH · 🧪 PoC

## Beschreibung

Sync-in Server is an open-source platform for file storage, sharing, collaboration, and syncing. Prior to version 2.4.0, `POST /api/auth/token` authenticates with username and password only, then calls `getTokens()`, which returns full access and refresh JWTs without checking whether the account has TOTP 2FA enabled. An attacker with stolen or phished credentials can bypass 2FA in a single request. The parallel login endpoint (`POST /api/auth/login`) correctly enforces 2FA by calling `setCookies(user, res, true)`, which gates on `user.twoFaEnabled`. Version 2.4.0 patches the issue.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 814d4e1f744fe709bdb4f5e9d4c6c6bd54982e09 (Commit)

## Referenzen

- <https://github.com/Sync-in/server/security/advisories/GHSA-92cr-jxw4-5wjg>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-58269) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_