CVE-2021-47952: Jsonpickle Python Jsonpickle

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

python jsonpickle 2.0.0 contains a remote code execution vulnerability that allows attackers to execute arbitrary Python commands by deserializing malicious JSON payloads containing py/repr objects. Attackers can craft JSON strings with py/repr directives that invoke the eval function during deserialization to execute arbitrary code.

Affected products

• Jsonpickle Python Jsonpickle: version 2.0.0 only
• Red Hat Red Hat Ansible Automation Platform 2

Published 2026-05-16. Last modified 2026-07-15.