CVE-2020-22083: Jsonpickle Project Jsonpickle

Critical severity, CVSS 9.8. EPSS: 6.5% chance of exploitation in the next 30 days.

jsonpickle through 1.4.1 allows remote code execution during deserialization of a malicious payload through the decode() function. Note: It has been argued that this is expected and clearly documented behaviour. pickle is known to be capable of causing arbitrary code execution, and must not be used with un-trusted data

Affected products

• Jsonpickle Project Jsonpickle: up to and including 1.4.1

Published 2020-12-17. Last modified 2026-06-17.