---
cve: "CVE-2026-33192"
severity: "HIGH"
cvss: 8.7
epss: "32%"
vendor: "Free5Gc"
kev: false
exploited: false
published: "2026-03-20 09:16:16"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T11:56:59+02:00"
---

# CVE-2026-33192

> 8.7 HIGH · 🧪 PoC

## Beschreibung

Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. In versions prior to 1.4.2, the UDM incorrectly converts a downstream 400 Bad Request (from UDR) into a 500 Internal Server Error when handling PATCH requests with an empty supi path parameter. Additionally, the UDM incorrectly translates the PATCH method to PUT when forwarding to UDR, indicating a deeper architectural issue. This leaks internal error handling behavior, making it difficult for clients to distinguish between client-side errors and server-side failures. The issue has been patched in version 1.4.2.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 65d7070f4bfd016864cbbaefbd506bbc85d2fa92 (Commit)

## Referenzen

- <https://github.com/free5gc/free5gc/security/advisories/GHSA-5rvc-5cwx-g5x8>
- <https://github.com/free5gc/free5gc/issues/784>
- <https://github.com/free5gc/udm/pull/79>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-33192) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_