VULNERABILITY INTELLIGENCE
CVE-2026-31072
CVSS score9.8 CRITICAL
EPSS probability0.81%
CISA KEVNot currently listed
Published2026-05-19
Last modified2026-07-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
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
Weakness classification
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-502
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c: CWE-502