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 (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 v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://gist.github.com/nedlir/11fb77f35a59cbba73392a086b02a9c6
https://github.com/agronholm/apscheduler
https://access.redhat.com/security/cve/CVE-2026-31072
https://bugzilla.redhat.com/show_bug.cgi?id=2479907
https://gist.github.com/nedlir/11fb77f35a59cbba73392a086b02a9c6
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31072.json

Configurations

No configuration.

History

No history.

Information

Published : 2026-05-19 16:16

Updated : 2026-07-24 12:10

NVD link : CVE-2026-31072

Mitre link : CVE-2026-31072

CVE.ORG link : CVE-2026-31072

JSON object : View

Products Affected

No product.

CWE

CWE-502

Deserialization of Untrusted Data

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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"}, {"lang": "es", "value": "Los JSONSerializer y CBORSerializer en APScheduler (todas las versiones, incluidas la 3.10.x y la 4.0.0a5) son vulnerables a la Ejecuci\u00f3n Remota de C\u00f3digo (RCE) a trav\u00e9s de la Deserializaci\u00f3n Insegura. La funci\u00f3n unmarshal_object permite la instanciaci\u00f3n arbitraria de clases y la inyecci\u00f3n de estado importando m\u00f3dulos din\u00e1micamente y llamando a __setstate__ en cualquier clase disponible en el entorno Python. Un atacante puede explotar esto enviando una carga \u00fatil JSON o CBOR especialmente dise\u00f1ada a una aplicaci\u00f3n que utilice estos serializadores."}], "lastModified": "2026-07-24T12:10:00.210", "sourceIdentifier": "cve@mitre.org"}