PT-2026-41450 · Jsonpickle · Python Jsonpickle

Published 2026-05-16 · Updated 2026-05-16 · CVE-2021-47952

Mitre

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 system commands and arbitrary code.

Exploit

Fix

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

CVE-2021-47952

Affected Products

Python Jsonpickle

References · 5

• 🔥 https://exploit-db.com/exploits/49585 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-47952 · Security Note
• https://github.com/jsonpickle/jsonpickle · Note
• https://vulncheck.com/advisories/python-jsonpickle-remote-code-execution-via-py-repr · Note
• https://jsonpickle.github.io · Note