CVE WatchJul 15, 2026

CVE-2026-31072

The JSONSerializer and CBORSerializer in APScheduler (all versions including 3.10.x and 4.0.0a5) are vulnerable to Remote Code Execution (RC

CVSS

9.8

Critical

EPSS

0.8%

p53

KEV

—

Exploit Today

0-100

Published: May 19, 2026 · Last modified: Jul 15, 2026 · CWE-502

EPSS · 30d

0.8%EPSS · 30 days0.8%

2026-06-302026-07-16

Technical 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

Official references

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