---
cve: "CVE-2026-9303"
severity: "MEDIUM"
cvss: 5.3
epss: "0.2%"
vendor: "calcom"
kev: false
exploited: false
published: "2026-05-23 14:16:43"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-26T06:17:50+02:00"
---

# CVE-2026-9303

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

A vulnerability was identified in calcom cal.diy up to 4.9.4. Impacted is an unknown function. The manipulation leads to cross-site request forgery. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

## 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/E:P
```

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

## Referenzen

- <https://vuldb.com/vuln/365250>
- <https://vuldb.com/vuln/365250/cti>
- <https://vuldb.com/submit/812173>
- <https://vuldb.com/submit/812175>
- <https://gist.github.com/YLChen-007/26663d9558e15994176dc420d2e11d48>
- <https://gist.github.com/YLChen-007/dafada36e356bc895b09829d8ec57e49>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-9303) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_