---
cve: "CVE-2026-90942"
severity: "CRITICAL"
cvss: 9.3
epss: "0.2%"
vendor: "casdoor"
kev: false
exploited: false
published: "2026-09-14 18:20:28"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T09:25:17+02:00"
---

# CVE-2026-90942

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

Casdoor through 4.4.0 fails to properly mask the instance-wide built-in certificate private key in /api/get-certs and /api/get-cert endpoints, allowing organization administrators to retrieve it. Attackers can use the exposed private key to forge JWT tokens for any user in any organization, including global administrators.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- e7f279996ac45dc4775867dafb92d08ad27a4e35 (Commit)

## Referenzen

- <https://github.com/geo-chen/oss/blob/main/casdoor.md#finding-3-organization-admin-can-read-the-global-built-in-jwt-signing-private-key-via-apiget-certs-and-apiget-cert-incomplete-fix-of-3003--enables-cross-organization-token-forgery>
- <https://github.com/casdoor/casdoor/blob/v4.4.0/controllers/cert.go>
- <https://github.com/casdoor/casdoor/blob/v4.4.0/object/cert.go>
- <https://github.com/casdoor/casdoor>
- <https://www.vulncheck.com/advisories/casdoor-through-4.4.0-private-key-exposure-via-certificate-endpoints>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-90942) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_