---
cve: "CVE-2026-31072"
severity: "CRITICAL"
cvss: 9.8
epss: "81%"
vendor: "n/a"
kev: false
exploited: false
published: "2026-05-19 00:00:00"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-15T06:11:03+02:00"
---

# CVE-2026-31072

> 9.8 CRITICAL · 🧪 PoC

## Beschreibung

The JSONSerializer and CBORSerializer in APScheduler (all versions including 3.10.x and 4.0.0a5) are vulnerable to Remote Code Execution (RCE) via Insecure Deserialization. The unmarshal_object function allows for arbitrary class instantiation and state injection by dynamically importing modules and calling __setstate__ on any class available in the Python environment. An attacker can exploit this by submitting a specially crafted JSON or CBOR payload to an application using these serializers

## CVSS-Vektor

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

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

## Referenzen

- <https://github.com/agronholm/apscheduler>
- <https://gist.github.com/nedlir/11fb77f35a59cbba73392a086b02a9c6>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-31072) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_