CVE-2026-31072: Red Hat Ansible Automation Platform 2

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

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

Affected products

• Red Hat Red Hat Ansible Automation Platform 2
• Red Hat Red Hat Openstack Platform 18.0
• Red Hat Red Hat Quay 3
• Red Hat Red Hat Satellite 6

Published 2026-05-19. Last modified 2026-07-24.