---
cve: "CVE-2026-63768"
severity: "MEDIUM"
cvss: 5.3
epss: "0.3%"
vendor: "calcom"
kev: false
exploited: false
published: "2026-07-20 19:17:29"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T12:58:36+02:00"
---

# CVE-2026-63768

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

cal.diy through 6.2.0 contains an open redirect vulnerability in the conferencing OAuth callback endpoint that allows attackers to redirect users to arbitrary URLs by crafting malicious state parameters. Attackers can exploit the unsigned state parameter and onErrorReturnTo field to silently redirect visitors from the trusted domain to attacker-controlled URLs for phishing attacks.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 1c193cca8682b33b9866c792186033f7ef886682 (Commit)

## Referenzen

- <https://github.com/calcom/cal.diy/issues/29679>
- <https://github.com/calcom/cal.diy/pull/29681>
- <https://www.vulncheck.com/advisories/cal-diy-conferencing-oauth-callback-open-redirect-via-unsigned-state>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-63768) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_